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.


H025_L050_C085
#f1003f
L: 50.21
a: 79.77
b: 36.33
λ*ext: 610 nm
λ*V2: 500.5 nm
H025_L055_C005
#977d7a
L: 55.02
a: 9.34
b: 5.83
λ*ext: 646 nm
λ*V2: 463.5 nm
H025_L055_C010
#9f7b76
L: 55.03
a: 13.65
b: 7.92
λ*ext: 646 nm
λ*V2: 463.8 nm
H025_L055_C015
#a77873
L: 55.05
a: 18
b: 9.93
λ*ext: 644 nm
λ*V2: 466.2 nm
H025_L055_C020
#af7470
L: 55.06
a: 22.39
b: 11.91
λ*ext: 642 nm
λ*V2: 467.5 nm
H025_L055_C025
#b6716d
L: 55.07
a: 26.78
b: 13.89
λ*ext: 641 nm
λ*V2: 469 nm
H025_L055_C030
#bd6d6a
L: 55.09
a: 31.17
b: 15.86
λ*ext: 639 nm
λ*V2: 471.3 nm
H025_L055_C035
#c46966
L: 55.1
a: 35.58
b: 17.82
λ*ext: 636 nm
λ*V2: 473.9 nm
H025_L055_C040
#cb6563
L: 55.12
a: 39.97
b: 19.82
λ*ext: 634 nm
λ*V2: 475.7 nm
H025_L055_C045
#d16160
L: 55.14
a: 44.38
b: 21.8
λ*ext: 631 nm
λ*V2: 478.7 nm
H025_L055_C050
#d75c5d
L: 55.15
a: 48.79
b: 23.79
λ*ext: 628 nm
λ*V2: 481.7 nm
H025_L055_C055
#de565a
L: 55.17
a: 53.21
b: 25.75
λ*ext: 625 nm
λ*V2: 484.8 nm
H025_L055_C060
#e45057
L: 55.18
a: 57.65
b: 27.69
λ*ext: 621 nm
λ*V2: 488.9 nm
H025_L055_C065
#ea4954
L: 55.2
a: 62.09
b: 29.6
λ*ext: 616 nm
λ*V2: 493.9 nm
H025_L055_C070
#f04251
L: 55.21
a: 66.52
b: 31.58
λ*ext: 611 nm
λ*V2: 498.9 nm
H025_L055_C075
#f6384f
L: 55.22
a: 70.99
b: 33.43
λ*ext: 606 nm
λ*V2: 503.9 nm
H025_L055_C080
#fc2c4c
L: 55.23
a: 75.45
b: 35.33
λ*ext: 599 nm
λ*V2: 511.4 nm
H025_L060_C005
#a58a86
L: 60.02
a: 9.68
b: 6.14
λ*ext: 630 nm
λ*V2: 479.7 nm
H025_L060_C010
#ae8782
L: 60.03
a: 14.02
b: 8.16
λ*ext: 628 nm
λ*V2: 481.7 nm
H025_L060_C015
#b6847f
L: 60.05
a: 18.37
b: 10.17
λ*ext: 626 nm
λ*V2: 483.9 nm
H025_L060_C020
#bd817c
L: 60.06
a: 22.74
b: 12.16
λ*ext: 624 nm
λ*V2: 486.3 nm
H025_L060_C025
#c57d79
L: 60.07
a: 27.15
b: 14.1
λ*ext: 622 nm
λ*V2: 488 nm
H025_L060_C030
#cc7a76
L: 60.09
a: 31.52
b: 16.11
λ*ext: 620 nm
λ*V2: 490.2 nm
H025_L060_C035
#d37672
L: 60.1
a: 35.92
b: 18.1
λ*ext: 618 nm
λ*V2: 492.1 nm
H025_L060_C040
#da726f
L: 60.12
a: 40.32
b: 20.05
λ*ext: 615 nm
λ*V2: 495.1 nm
H025_L060_C045
#e16d6c
L: 60.13
a: 44.72
b: 22.05
λ*ext: 612 nm
λ*V2: 498.4 nm
H025_L060_C050
#e76969
L: 60.15
a: 49.13
b: 24.01
λ*ext: 608 nm
λ*V2: 501.8 nm
H025_L060_C055
#ee6466
L: 60.17
a: 53.54
b: 26.02
λ*ext: 604 nm
λ*V2: 505.7 nm
H025_L060_C060
#f45e63
L: 60.18
a: 57.97
b: 27.95
λ*ext: 601 nm
λ*V2: 509.4 nm
H025_L060_C065
#fa5860
L: 60.2
a: 62.39
b: 29.92
λ*ext: 597 nm
λ*V2: 512.7 nm
H025_L060_C070
#ff515d
L: 60.21
a: 66.84
b: 31.85
λ*ext: 592 nm
λ*V2: 518.4 nm
H025_L060_C075
#ff485a
L: 60.22
a: 71.27
b: 33.81
λ*ext: 586 nm
λ*V2: 523.9 nm
H025_L065_C005
#b49792
L: 65.02
a: 10.08
b: 6.32
λ*ext: 609 nm
λ*V2: 500.7 nm
H025_L065_C010
#bc948f
L: 65.03
a: 14.39
b: 8.38
λ*ext: 608 nm
λ*V2: 501.8 nm
H025_L065_C015
#c4918c
L: 65.05
a: 18.74
b: 10.39
λ*ext: 605 nm
λ*V2: 504.9 nm
H025_L065_C020
#cc8e88
L: 65.06
a: 23.12
b: 12.37
λ*ext: 603 nm
λ*V2: 506.7 nm
H025_L065_C025
#d48a85
L: 65.07
a: 27.51
b: 14.33
λ*ext: 601 nm
λ*V2: 509.3 nm
H025_L065_C030
#db8782
L: 65.09
a: 31.88
b: 16.35
λ*ext: 599 nm
λ*V2: 510.9 nm
H025_L065_C035
#e3837f
L: 65.1
a: 36.28
b: 18.32
λ*ext: 596 nm
λ*V2: 513.9 nm
H025_L065_C040
#ea7f7c
L: 65.12
a: 40.68
b: 20.25
λ*ext: 592 nm
λ*V2: 517.8 nm
H025_L065_C045
#f17a78
L: 65.13
a: 45.07
b: 22.27
λ*ext: 589 nm
λ*V2: 520.9 nm
H025_L065_C050
#f77675
L: 65.15
a: 49.47
b: 24.28
λ*ext: 586 nm
λ*V2: 524.1 nm
H025_L065_C055
#fe7172
L: 65.17
a: 53.89
b: 26.23
λ*ext: 581 nm
λ*V2: 528.6 nm
H025_L065_C060
#ff6b6f
L: 65.18
a: 58.3
b: 28.21
λ*ext: 577 nm
λ*V2: 532.5 nm
H025_L065_C065
#ff666c
L: 65.2
a: 62.71
b: 30.22
λ*ext: 573 nm
λ*V2: 537.4 nm
H025_L070_C005
#c2a49f
L: 70.02
a: 10.44
b: 6.57
λ*ext: 588 nm
λ*V2: 522.2 nm
H025_L070_C010
#cba19c
L: 70.03
a: 14.77
b: 8.59
λ*ext: 585 nm
λ*V2: 525.2 nm
H025_L070_C015
#d39e98
L: 70.05
a: 19.12
b: 10.6
λ*ext: 582 nm
λ*V2: 527.6 nm
H025_L070_C020
#db9b95
L: 70.06
a: 23.5
b: 12.57
λ*ext: 579 nm
λ*V2: 530.6 nm
H025_L070_C025
#e39792
L: 70.07
a: 27.87
b: 14.57
λ*ext: 578 nm
λ*V2: 532.2 nm
H025_L070_C030
#eb948e
L: 70.08
a: 32.25
b: 16.55
λ*ext: 575 nm
λ*V2: 535.1 nm
H025_L070_C035
#f2908b
L: 70.1
a: 36.63
b: 18.56
λ*ext: 572 nm
λ*V2: 538.4 nm
H025_L070_C040
#f98c88
L: 70.11
a: 41.02
b: 20.56
λ*ext: 568 nm
λ*V2: 541.7 nm
H025_L070_C045
#ff8885
L: 70.13
a: 45.42
b: 22.52
λ*ext: 564 nm
λ*V2: 546 nm
H025_L070_C050
#ff8381
L: 70.15
a: 49.81
b: 24.55
λ*ext: 561 nm
λ*V2: 549 nm
H025_L070_C055
#ff7e7e
L: 70.16
a: 54.21
b: 26.54
λ*ext: 557 nm
λ*V2: 553.2 nm
H025_L075_C005
#d1b1ac
L: 75.02
a: 10.84
b: 6.75
λ*ext: 561 nm
λ*V2: 549.2 nm
H025_L075_C010
#daaea9
L: 75.04
a: 15.17
b: 8.78
λ*ext: 558 nm
λ*V2: 551.9 nm
H025_L075_C015
#e2aba5
L: 75.05
a: 19.5
b: 10.81
λ*ext: 556 nm
λ*V2: 553.6 nm
H025_L075_C020
#eba8a2
L: 75.06
a: 23.87
b: 12.8
λ*ext: 554 nm
λ*V2: 556.3 nm
H025_L075_C025
#f3a49f
L: 75.07
a: 28.26
b: 14.75
λ*ext: 550 nm
λ*V2: 559.8 nm
H025_L075_C030
#faa19b
L: 75.08
a: 32.61
b: 16.79
λ*ext: 549 nm
λ*V2: 560.6 nm
H025_L075_C035
#ff9d98
L: 75.1
a: 36.99
b: 18.78
λ*ext: 544 nm
λ*V2: 566.1 nm
H025_L075_C040
#ff9994
L: 75.11
a: 41.38
b: 20.78
λ*ext: 541 nm
λ*V2: 568.4 nm
H025_L075_C045
#ff9591
L: 75.13
a: 45.76
b: 22.8
λ*ext: 538 nm
λ*V2: 571.5 nm
H025_L080_C005
#e0beb9
L: 80.02
a: 11.22
b: 6.98
λ*ext: 533 nm
λ*V2: 576.8 nm
H025_L080_C010
#e9bbb6
L: 80.03
a: 15.53
b: 9.02
λ*ext: 531 nm
λ*V2: 579.3 nm
H025_L080_C015
#f2b8b2
L: 80.05
a: 19.88
b: 11.03
λ*ext: 527 nm
λ*V2: 583.2 nm
H025_L080_C020
#fab5af
L: 80.06
a: 24.24
b: 13.02
λ*ext: 524 nm
λ*V2: 585.5 nm
H025_L080_C025
#ffb2ac
L: 80.07
a: 28.62
b: 15
λ*ext: 521 nm
λ*V2: 588.6 nm
H025_L080_C030
#ffaea8
L: 80.08
a: 32.98
b: 17.02
λ*ext: 519 nm
λ*V2: 590.8 nm
H025_L080_C035
#ffaaa5
L: 80.1
a: 37.35
b: 19.03
λ*ext: 518 nm
λ*V2: 592.3 nm
H025_L085_C005
#efccc7
L: 85.02
a: 11.6
b: 7.19
λ*ext: 501 nm
λ*V2: 609.5 nm
H025_L085_C010
#f8c9c3
L: 85.03
a: 15.93
b: 9.21
λ*ext: 498 nm
λ*V2: 612.2 nm
H025_L085_C015
#ffc6c0
L: 85.05
a: 20.26
b: 11.23
λ*ext: 495 nm
λ*V2: 615.5 nm
H025_L085_C020
#ffc3bc
L: 85.06
a: 24.61
b: 13.26
λ*ext: 492 nm
λ*V2: 617.7 nm
H025_L090_C005
#ffdad4
L: 90.02
a: 11.95
b: 7.48
λ*ext: 467 nm
λ*V2: 643.1 nm
H025_L090_C010
#ffd7d1
L: 90.03
a: 16.28
b: 9.49
λ*ext: 465 nm
λ*V2: 645.3 nm
H030_L005_C005
#1a0d0b
L: 5.01
a: 5.3
b: 3
λ*ext: 727 nm
λ*V2: 382.4 nm
H030_L010_C005
#251816
L: 10.01
a: 5.93
b: 3.79
λ*ext: 725 nm
λ*V2: 384.5 nm
H030_L010_C010
#2a1613
L: 10.04
a: 10.11
b: 6.05
λ*ext: 725 nm
λ*V2: 384.7 nm
H030_L010_C015
#2f130f
L: 10.04
a: 14.25
b: 8.35
λ*ext: 725 nm
λ*V2: 385 nm
H030_L010_C020
#340f0b
L: 10.05
a: 18.44
b: 10.57
λ*ext: 723 nm
λ*V2: 386.4 nm
H030_L015_C005
#302220
L: 15.01
a: 6.25
b: 4.15
λ*ext: 722 nm
λ*V2: 387.3 nm
H030_L015_C010
#361f1d
L: 15.02
a: 10.45
b: 6.44
λ*ext: 722 nm
λ*V2: 387.8 nm
H030_L015_C015
#3b1d1a
L: 15.04
a: 14.63
b: 8.81
λ*ext: 721 nm
λ*V2: 388.2 nm
H030_L015_C020
#411916
L: 15.05
a: 18.83
b: 11.21
λ*ext: 721 nm
λ*V2: 388.5 nm
H030_L015_C025
#461513
L: 15.08
a: 23
b: 13.63
λ*ext: 720 nm
λ*V2: 389.4 nm
H030_L015_C030
#4a1010
L: 15.07
a: 27.25
b: 15.89
λ*ext: 719 nm
λ*V2: 390.9 nm
H030_L020_C005
#3c2c2a
L: 20.01
a: 6.61
b: 4.42
λ*ext: 718 nm
λ*V2: 391.3 nm
H030_L020_C010
#422a26
L: 20.03
a: 10.77
b: 6.77
λ*ext: 717 nm
λ*V2: 392.2 nm
H030_L020_C015
#482723
L: 20.04
a: 14.92
b: 9.18
λ*ext: 717 nm
λ*V2: 392.4 nm
H030_L020_C020
#4d2420
L: 20.06
a: 19.11
b: 11.51
λ*ext: 716 nm
λ*V2: 393.6 nm
H030_L020_C025
#53201d
L: 20.07
a: 23.35
b: 13.85
λ*ext: 716 nm
λ*V2: 393.6 nm
H030_L020_C030
#581c1a
L: 20.08
a: 27.58
b: 16.17
λ*ext: 715 nm
λ*V2: 394.9 nm
H030_L020_C035
#5d1617
L: 20.1
a: 31.79
b: 18.59
λ*ext: 713 nm
λ*V2: 396.3 nm
H030_L020_C040
#620f13
L: 20.09
a: 36.07
b: 20.91
λ*ext: 712 nm
λ*V2: 398.1 nm
H030_L025_C005
#483734
L: 25.01
a: 6.98
b: 4.66
λ*ext: 713 nm
λ*V2: 396.8 nm
H030_L025_C010
#4e3431
L: 25.02
a: 11.12
b: 7.07
λ*ext: 712 nm
λ*V2: 397.2 nm
H030_L025_C015
#55322d
L: 25.04
a: 15.26
b: 9.47
λ*ext: 712 nm
λ*V2: 397.9 nm
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