This atlas presents colors not only as they appear visually, but as they are spectrally structured.

In addition to standard color specifications (HEX, Lab D50/2°, HLC), two spectral–physical parameters are provided:

  • λ*ext describes the spectral dominance of a color, indicating whether its reflectance is biased toward shorter or longer wavelengths.
  • ARBE λ*V2 denotes the energetic balance point between absorption and reflection within the visible spectrum (380–730 nm).

Both parameters are computed directly from measured reflectance spectra and are independent of illuminant, observer model, or color space.

The atlas thus reveals where colors are energetically stable and where, despite a similar visual appearance, spectral differences and metameric risks arise. Use the filters, sorting options, and scatter view to compare colors on a physically grounded basis.

Note: ARBE λ* is not a color space and not a replacement for Lab or ΔE, but an additional layer of physical color description.


H015_L035_C040
#903140
L: 35.14
a: 41.29
b: 12.35
λ*ext: 687 nm
λ*V2: 423.1 nm
H015_L035_C045
#962a3f
L: 35.16
a: 46.05
b: 13.45
λ*ext: 684 nm
λ*V2: 425.9 nm
H015_L035_C050
#9c223e
L: 35.17
a: 50.83
b: 14.52
λ*ext: 681 nm
λ*V2: 428.8 nm
H015_L035_C055
#a1153d
L: 35.17
a: 55.66
b: 15.41
λ*ext: 677 nm
λ*V2: 432.7 nm
H015_L035_C060
#a7003c
L: 35.17
a: 60.51
b: 16.27
λ*ext: 673 nm
λ*V2: 436.8 nm
H015_L040_C005
#6e5957
L: 40.02
a: 8.58
b: 4.34
λ*ext: 688 nm
λ*V2: 421.5 nm
H015_L040_C010
#765655
L: 40.04
a: 13.27
b: 5.57
λ*ext: 687 nm
λ*V2: 422.6 nm
H015_L040_C015
#7d5354
L: 40.06
a: 17.96
b: 6.78
λ*ext: 685 nm
λ*V2: 424.7 nm
H015_L040_C020
#844f52
L: 40.07
a: 22.68
b: 7.96
λ*ext: 683 nm
λ*V2: 426.3 nm
H015_L040_C025
#8b4b50
L: 40.09
a: 27.41
b: 9.15
λ*ext: 682 nm
λ*V2: 428.1 nm
H015_L040_C030
#92474f
L: 40.11
a: 32.13
b: 10.35
λ*ext: 680 nm
λ*V2: 429.8 nm
H015_L040_C035
#98434d
L: 40.13
a: 36.86
b: 11.5
λ*ext: 677 nm
λ*V2: 432.4 nm
H015_L040_C040
#9f3d4b
L: 40.14
a: 41.61
b: 12.66
λ*ext: 675 nm
λ*V2: 434.4 nm
H015_L040_C045
#a5374a
L: 40.16
a: 46.36
b: 13.78
λ*ext: 673 nm
λ*V2: 437.1 nm
H015_L040_C050
#ab3049
L: 40.18
a: 51.13
b: 14.85
λ*ext: 669 nm
λ*V2: 440.5 nm
H015_L040_C055
#b12747
L: 40.19
a: 55.91
b: 15.9
λ*ext: 666 nm
λ*V2: 444.1 nm
H015_L040_C060
#b71b46
L: 40.19
a: 60.73
b: 16.88
λ*ext: 661 nm
λ*V2: 448.6 nm
H015_L040_C065
#bd0345
L: 40.19
a: 65.59
b: 17.67
λ*ext: 656 nm
λ*V2: 454.1 nm
H015_L040_C070
#c20044
L: 40.2
a: 70.43
b: 18.48
λ*ext: 651 nm
λ*V2: 458.9 nm
H015_L045_C005
#7c6563
L: 45.02
a: 8.94
b: 4.6
λ*ext: 676 nm
λ*V2: 433.2 nm
H015_L045_C010
#846261
L: 45.04
a: 13.62
b: 5.85
λ*ext: 675 nm
λ*V2: 434.3 nm
H015_L045_C015
#8b5f5f
L: 45.06
a: 18.33
b: 7.02
λ*ext: 672 nm
λ*V2: 437.5 nm
H015_L045_C020
#925b5d
L: 45.07
a: 23.03
b: 8.23
λ*ext: 671 nm
λ*V2: 438.6 nm
H015_L045_C025
#9a575c
L: 45.09
a: 27.75
b: 9.42
λ*ext: 670 nm
λ*V2: 440 nm
H015_L045_C030
#a0535a
L: 45.11
a: 32.48
b: 10.59
λ*ext: 667 nm
λ*V2: 442.4 nm
H015_L045_C035
#a74f58
L: 45.13
a: 37.21
b: 11.76
λ*ext: 665 nm
λ*V2: 444.8 nm
H015_L045_C040
#ae4a57
L: 45.14
a: 41.95
b: 12.94
λ*ext: 662 nm
λ*V2: 447.4 nm
H015_L045_C045
#b44455
L: 45.16
a: 46.69
b: 14.06
λ*ext: 659 nm
λ*V2: 450.4 nm
H015_L045_C050
#ba3e54
L: 45.18
a: 51.44
b: 15.21
λ*ext: 656 nm
λ*V2: 453.7 nm
H015_L045_C055
#c13652
L: 45.19
a: 56.22
b: 16.24
λ*ext: 652 nm
λ*V2: 458.3 nm
H015_L045_C060
#c72d51
L: 45.2
a: 60.99
b: 17.33
λ*ext: 647 nm
λ*V2: 462.6 nm
H015_L045_C065
#cd2150
L: 45.21
a: 65.79
b: 18.34
λ*ext: 643 nm
λ*V2: 467 nm
H015_L045_C070
#d30b4f
L: 45.21
a: 70.65
b: 19.16
λ*ext: 637 nm
λ*V2: 473 nm
H015_L045_C075
#d9004e
L: 45.21
a: 75.53
b: 19.82
λ*ext: 630 nm
λ*V2: 480.3 nm
H015_L050_C005
#89716f
L: 50.02
a: 9.3
b: 4.84
λ*ext: 663 nm
λ*V2: 447 nm
H015_L050_C010
#926e6d
L: 50.04
a: 13.99
b: 6.07
λ*ext: 661 nm
λ*V2: 449.1 nm
H015_L050_C015
#996b6b
L: 50.06
a: 18.68
b: 7.28
λ*ext: 659 nm
λ*V2: 451.1 nm
H015_L050_C020
#a16769
L: 50.08
a: 23.39
b: 8.46
λ*ext: 656 nm
λ*V2: 453.6 nm
H015_L050_C025
#a86368
L: 50.09
a: 28.11
b: 9.65
λ*ext: 655 nm
λ*V2: 455.1 nm
H015_L050_C030
#af5f66
L: 50.11
a: 32.84
b: 10.82
λ*ext: 652 nm
λ*V2: 457.6 nm
H015_L050_C035
#b65b64
L: 50.13
a: 37.57
b: 11.99
λ*ext: 650 nm
λ*V2: 460 nm
H015_L050_C040
#bd5663
L: 50.14
a: 42.3
b: 13.15
λ*ext: 647 nm
λ*V2: 462.9 nm
H015_L050_C045
#c35161
L: 50.16
a: 47.04
b: 14.31
λ*ext: 644 nm
λ*V2: 465.9 nm
H015_L050_C050
#ca4b5f
L: 50.18
a: 51.79
b: 15.44
λ*ext: 640 nm
λ*V2: 470.2 nm
H015_L050_C055
#d0445e
L: 50.2
a: 56.54
b: 16.54
λ*ext: 635 nm
λ*V2: 474.8 nm
H015_L050_C060
#d73d5c
L: 50.21
a: 61.31
b: 17.66
λ*ext: 632 nm
λ*V2: 478.4 nm
H015_L050_C065
#dd335b
L: 50.22
a: 66.09
b: 18.71
λ*ext: 626 nm
λ*V2: 483.6 nm
H015_L050_C070
#e3275a
L: 50.23
a: 70.87
b: 19.77
λ*ext: 622 nm
λ*V2: 488.6 nm
H015_L050_C075
#e91358
L: 50.23
a: 75.71
b: 20.64
λ*ext: 613 nm
λ*V2: 497 nm
H015_L050_C080
#ef0057
L: 50.22
a: 80.55
b: 21.51
λ*ext: 606 nm
λ*V2: 504.6 nm
H015_L055_C005
#977d7b
L: 55.02
a: 9.67
b: 5.1
λ*ext: 647 nm
λ*V2: 462.5 nm
H015_L055_C010
#a07a79
L: 55.04
a: 14.34
b: 6.33
λ*ext: 645 nm
λ*V2: 464.5 nm
H015_L055_C015
#a87777
L: 55.06
a: 19.04
b: 7.52
λ*ext: 642 nm
λ*V2: 467.6 nm
H015_L055_C020
#af7475
L: 55.08
a: 23.76
b: 8.69
λ*ext: 639 nm
λ*V2: 470.8 nm
H015_L055_C025
#b77074
L: 55.09
a: 28.49
b: 9.85
λ*ext: 637 nm
λ*V2: 472.7 nm
H015_L055_C030
#be6c72
L: 55.11
a: 33.21
b: 11.06
λ*ext: 635 nm
λ*V2: 474.6 nm
H015_L055_C035
#c56870
L: 55.13
a: 37.93
b: 12.23
λ*ext: 633 nm
λ*V2: 477.1 nm
H015_L055_C040
#cc636e
L: 55.14
a: 42.66
b: 13.38
λ*ext: 629 nm
λ*V2: 481.2 nm
H015_L055_C045
#d35e6d
L: 55.16
a: 47.4
b: 14.53
λ*ext: 625 nm
λ*V2: 484.8 nm
H015_L055_C050
#da586b
L: 55.18
a: 52.13
b: 15.69
λ*ext: 621 nm
λ*V2: 488.9 nm
H015_L055_C055
#e05269
L: 55.19
a: 56.86
b: 16.88
λ*ext: 618 nm
λ*V2: 491.9 nm
H015_L055_C060
#e74b68
L: 55.21
a: 61.63
b: 17.97
λ*ext: 613 nm
λ*V2: 497 nm
H015_L055_C065
#ed4366
L: 55.22
a: 66.39
b: 19.08
λ*ext: 608 nm
λ*V2: 501.7 nm
H015_L055_C070
#f33965
L: 55.23
a: 71.16
b: 20.17
λ*ext: 601 nm
λ*V2: 508.8 nm
H015_L055_C075
#fa2d64
L: 55.24
a: 75.96
b: 21.16
λ*ext: 594 nm
λ*V2: 516.1 nm
H015_L055_C080
#ff1a62
L: 55.25
a: 80.74
b: 22.14
λ*ext: 591 nm
λ*V2: 519 nm
H015_L060_C005
#a68a87
L: 60.02
a: 10.04
b: 5.32
λ*ext: 629 nm
λ*V2: 480.6 nm
H015_L060_C010
#ae8785
L: 60.04
a: 14.72
b: 6.54
λ*ext: 627 nm
λ*V2: 483.3 nm
H015_L060_C015
#b68483
L: 60.06
a: 19.42
b: 7.73
λ*ext: 623 nm
λ*V2: 486.4 nm
H015_L060_C020
#be8082
L: 60.07
a: 24.13
b: 8.93
λ*ext: 621 nm
λ*V2: 489 nm
H015_L060_C025
#c67c80
L: 60.09
a: 28.86
b: 10.09
λ*ext: 618 nm
λ*V2: 491.5 nm
H015_L060_C030
#cd787e
L: 60.11
a: 33.56
b: 11.3
λ*ext: 615 nm
λ*V2: 494.5 nm
H015_L060_C035
#d4747c
L: 60.12
a: 38.29
b: 12.47
λ*ext: 613 nm
λ*V2: 496.9 nm
H015_L060_C040
#db707b
L: 60.14
a: 43.02
b: 13.64
λ*ext: 609 nm
λ*V2: 500.6 nm
H015_L060_C045
#e26b79
L: 60.16
a: 47.74
b: 14.81
λ*ext: 606 nm
λ*V2: 504.3 nm
H015_L060_C050
#e96677
L: 60.18
a: 52.47
b: 15.99
λ*ext: 602 nm
λ*V2: 508.3 nm
H015_L060_C055
#f06075
L: 60.19
a: 57.21
b: 17.15
λ*ext: 598 nm
λ*V2: 512.2 nm
H015_L060_C060
#f75974
L: 60.21
a: 61.95
b: 18.28
λ*ext: 592 nm
λ*V2: 518.3 nm
H015_L060_C065
#fd5272
L: 60.22
a: 66.72
b: 19.38
λ*ext: 585 nm
λ*V2: 525.2 nm
H015_L060_C070
#ff4971
L: 60.24
a: 71.48
b: 20.48
λ*ext: 581 nm
λ*V2: 529.2 nm
H015_L065_C005
#b49794
L: 65.02
a: 10.4
b: 5.59
λ*ext: 611 nm
λ*V2: 499.1 nm
H015_L065_C010
#bc9492
L: 65.04
a: 15.09
b: 6.79
λ*ext: 607 nm
λ*V2: 502.9 nm
H015_L065_C015
#c59090
L: 65.06
a: 19.79
b: 7.97
λ*ext: 603 nm
λ*V2: 506.8 nm
H015_L065_C020
#cd8d8e
L: 65.07
a: 24.49
b: 9.18
λ*ext: 600 nm
λ*V2: 509.7 nm
H015_L065_C025
#d5898c
L: 65.09
a: 29.22
b: 10.34
λ*ext: 598 nm
λ*V2: 512.4 nm
H015_L065_C030
#dc858a
L: 65.1
a: 33.93
b: 11.53
λ*ext: 595 nm
λ*V2: 514.9 nm
H015_L065_C035
#e48189
L: 65.12
a: 38.67
b: 12.67
λ*ext: 590 nm
λ*V2: 520.1 nm
H015_L065_C040
#eb7d87
L: 65.14
a: 43.38
b: 13.87
λ*ext: 587 nm
λ*V2: 523 nm
H015_L065_C045
#f27885
L: 65.16
a: 48.11
b: 15.04
λ*ext: 582 nm
λ*V2: 527.9 nm
H015_L065_C050
#f97383
L: 65.18
a: 52.83
b: 16.22
λ*ext: 578 nm
λ*V2: 532 nm
H015_L065_C055
#ff6d82
L: 65.19
a: 57.56
b: 17.4
λ*ext: 574 nm
λ*V2: 536.4 nm
H015_L065_C060
#ff6780
L: 65.21
a: 62.29
b: 18.6
λ*ext: 567 nm
λ*V2: 542.6 nm
H015_L065_C065
#ff607e
L: 65.23
a: 67.06
b: 19.6
λ*ext: 564 nm
λ*V2: 545.3 nm
H015_L070_C005
#c2a4a1
L: 70.02
a: 10.8
b: 5.77
λ*ext: 587 nm
λ*V2: 522.6 nm
H015_L070_C010
#cba19f
L: 70.04
a: 15.48
b: 6.99
λ*ext: 583 nm
λ*V2: 526.5 nm
H015_L070_C015
#d49d9d
L: 70.06
a: 20.16
b: 8.19
λ*ext: 579 nm
λ*V2: 530.8 nm
H015_L070_C020
#dc9a9b
L: 70.07
a: 24.87
b: 9.39
λ*ext: 577 nm
λ*V2: 533 nm
H015_L070_C025
#e49699
L: 70.09
a: 29.58
b: 10.58
λ*ext: 575 nm
λ*V2: 535.4 nm
H015_L070_C030
#ec9297
L: 70.1
a: 34.31
b: 11.73
λ*ext: 570 nm
λ*V2: 539.9 nm
H015_L070_C035
#f38e95
L: 70.12
a: 39.03
b: 12.91
λ*ext: 565 nm
λ*V2: 544.9 nm
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