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_L070_C040
#fb8a93
L: 70.14
a: 43.74
b: 14.12
λ*ext: 562 nm
λ*V2: 547.9 nm
H015_L070_C045
#ff8592
L: 70.16
a: 48.47
b: 15.27
λ*ext: 556 nm
λ*V2: 553.9 nm
H015_L070_C050
#ff8090
L: 70.17
a: 53.18
b: 16.48
λ*ext: 551 nm
λ*V2: 559 nm
H015_L070_C055
#ff7b8e
L: 70.19
a: 57.93
b: 17.57
λ*ext: 548 nm
λ*V2: 561.5 nm
H015_L075_C005
#d1b1ae
L: 75.02
a: 11.18
b: 5.98
λ*ext: 562 nm
λ*V2: 548.3 nm
H015_L075_C010
#daaeac
L: 75.04
a: 15.86
b: 7.2
λ*ext: 558 nm
λ*V2: 552 nm
H015_L075_C015
#e3aaaa
L: 75.06
a: 20.56
b: 8.39
λ*ext: 553 nm
λ*V2: 556.5 nm
H015_L075_C020
#eba7a8
L: 75.07
a: 25.26
b: 9.59
λ*ext: 550 nm
λ*V2: 560.3 nm
H015_L075_C025
#f3a3a6
L: 75.09
a: 29.98
b: 10.74
λ*ext: 545 nm
λ*V2: 564.6 nm
H015_L075_C030
#fb9fa4
L: 75.1
a: 34.68
b: 11.96
λ*ext: 543 nm
λ*V2: 567 nm
H015_L075_C035
#ff9ba2
L: 75.12
a: 39.39
b: 13.15
λ*ext: 538 nm
λ*V2: 571.5 nm
H015_L075_C040
#ff97a0
L: 75.14
a: 44.12
b: 14.3
λ*ext: 532 nm
λ*V2: 578.1 nm
H015_L075_C045
#ff929f
L: 75.15
a: 48.84
b: 15.46
λ*ext: 530 nm
λ*V2: 579.3 nm
H015_L080_C005
#e0bebb
L: 80.02
a: 11.55
b: 6.21
λ*ext: 533 nm
λ*V2: 576.7 nm
H015_L080_C010
#e9bbb9
L: 80.04
a: 16.23
b: 7.44
λ*ext: 530 nm
λ*V2: 580 nm
H015_L080_C015
#f2b8b7
L: 80.05
a: 20.93
b: 8.61
λ*ext: 524 nm
λ*V2: 585.6 nm
H015_L080_C020
#fbb4b5
L: 80.07
a: 25.64
b: 9.8
λ*ext: 521 nm
λ*V2: 589.2 nm
H015_L080_C025
#ffb1b3
L: 80.09
a: 30.36
b: 10.94
λ*ext: 515 nm
λ*V2: 595.4 nm
H015_L080_C030
#ffadb1
L: 80.1
a: 35.06
b: 12.17
λ*ext: 512 nm
λ*V2: 597.4 nm
H015_L085_C005
#efccc8
L: 85.02
a: 11.94
b: 6.43
λ*ext: 501 nm
λ*V2: 608.8 nm
H015_L085_C010
#f9c9c6
L: 85.04
a: 16.64
b: 7.58
λ*ext: 495 nm
λ*V2: 615.5 nm
H015_L085_C015
#ffc5c4
L: 85.06
a: 21.32
b: 8.81
λ*ext: 492 nm
λ*V2: 618.5 nm
H015_L085_C020
#ffc2c2
L: 85.07
a: 26.01
b: 10.04
λ*ext: 488 nm
λ*V2: 621.6 nm
H015_L090_C005
#ffdad6
L: 90.02
a: 12.32
b: 6.65
λ*ext: 467 nm
λ*V2: 643.6 nm
H015_L090_C010
#ffd6d4
L: 90.04
a: 17
b: 7.87
λ*ext: 463 nm
λ*V2: 647.7 nm
H020_L005_C005
#1a0d0d
L: 5.01
a: 5.83
b: 2.15
λ*ext: 727 nm
λ*V2: 382.4 nm
H020_L010_C005
#251817
L: 10.02
a: 6.37
b: 3.02
λ*ext: 725 nm
λ*V2: 384.5 nm
H020_L010_C010
#2b1515
L: 10.04
a: 10.92
b: 4.59
λ*ext: 725 nm
λ*V2: 385 nm
H020_L010_C015
#301213
L: 10.05
a: 15.48
b: 6.17
λ*ext: 724 nm
λ*V2: 385.4 nm
H020_L010_C020
#350e11
L: 10.04
a: 20.19
b: 7.49
λ*ext: 723 nm
λ*V2: 386.3 nm
H020_L015_C005
#302221
L: 15.02
a: 6.68
b: 3.38
λ*ext: 722 nm
λ*V2: 387.5 nm
H020_L015_C010
#361f1f
L: 15.04
a: 11.22
b: 4.99
λ*ext: 722 nm
λ*V2: 387.9 nm
H020_L015_C015
#3c1c1d
L: 15.05
a: 15.83
b: 6.54
λ*ext: 721 nm
λ*V2: 388.7 nm
H020_L015_C020
#42181b
L: 15.06
a: 20.39
b: 8.14
λ*ext: 720 nm
λ*V2: 389.1 nm
H020_L015_C025
#471319
L: 15.08
a: 25.02
b: 9.64
λ*ext: 719 nm
λ*V2: 390.3 nm
H020_L015_C030
#4c0d17
L: 15.07
a: 29.72
b: 10.99
λ*ext: 717 nm
λ*V2: 392.3 nm
H020_L020_C005
#3c2c2b
L: 20.02
a: 7.03
b: 3.62
λ*ext: 718 nm
λ*V2: 391.7 nm
H020_L020_C010
#422929
L: 20.03
a: 11.58
b: 5.24
λ*ext: 717 nm
λ*V2: 392.3 nm
H020_L020_C015
#492627
L: 20.05
a: 16.15
b: 6.84
λ*ext: 716 nm
λ*V2: 393.1 nm
H020_L020_C020
#4e2324
L: 20.07
a: 20.73
b: 8.46
λ*ext: 716 nm
λ*V2: 393.5 nm
H020_L020_C025
#541e23
L: 20.08
a: 25.34
b: 9.97
λ*ext: 714 nm
λ*V2: 395.2 nm
H020_L020_C030
#591921
L: 20.1
a: 29.95
b: 11.52
λ*ext: 713 nm
λ*V2: 396.3 nm
H020_L020_C035
#5f131f
L: 20.1
a: 34.61
b: 12.94
λ*ext: 711 nm
λ*V2: 398.4 nm
H020_L020_C040
#64081d
L: 20.1
a: 39.26
b: 14.4
λ*ext: 710 nm
λ*V2: 399.3 nm
H020_L025_C005
#483735
L: 25.02
a: 7.39
b: 3.9
λ*ext: 713 nm
λ*V2: 397 nm
H020_L025_C010
#4f3433
L: 25.03
a: 11.9
b: 5.58
λ*ext: 712 nm
λ*V2: 397.4 nm
H020_L025_C015
#553131
L: 25.05
a: 16.47
b: 7.17
λ*ext: 711 nm
λ*V2: 398.3 nm
H020_L025_C020
#5b2e2f
L: 25.07
a: 21.04
b: 8.77
λ*ext: 710 nm
λ*V2: 399.4 nm
H020_L025_C025
#612a2d
L: 25.08
a: 25.62
b: 10.37
λ*ext: 709 nm
λ*V2: 400.5 nm
H020_L025_C030
#67252b
L: 25.1
a: 30.25
b: 11.86
λ*ext: 708 nm
λ*V2: 402.1 nm
H020_L025_C035
#6d1f29
L: 25.11
a: 34.87
b: 13.43
λ*ext: 707 nm
λ*V2: 403.1 nm
H020_L025_C040
#721827
L: 25.13
a: 39.5
b: 14.9
λ*ext: 704 nm
λ*V2: 405.8 nm
H020_L025_C045
#780e25
L: 25.12
a: 44.2
b: 16.23
λ*ext: 702 nm
λ*V2: 408 nm
H020_L025_C050
#7d0023
L: 25.14
a: 48.83
b: 17.66
λ*ext: 700 nm
λ*V2: 410.1 nm
H020_L030_C005
#554240
L: 30.02
a: 7.72
b: 4.22
λ*ext: 706 nm
λ*V2: 403.5 nm
H020_L030_C010
#5c3f3e
L: 30.03
a: 12.26
b: 5.84
λ*ext: 705 nm
λ*V2: 404.2 nm
H020_L030_C015
#623c3b
L: 30.05
a: 16.82
b: 7.42
λ*ext: 704 nm
λ*V2: 405.6 nm
H020_L030_C020
#693939
L: 30.07
a: 21.41
b: 8.96
λ*ext: 702 nm
λ*V2: 407.8 nm
H020_L030_C025
#6f3537
L: 30.08
a: 25.98
b: 10.62
λ*ext: 702 nm
λ*V2: 407.8 nm
H020_L030_C030
#753035
L: 30.1
a: 30.57
b: 12.2
λ*ext: 701 nm
λ*V2: 409.1 nm
H020_L030_C035
#7b2b33
L: 30.12
a: 35.16
b: 13.79
λ*ext: 699 nm
λ*V2: 410.8 nm
H020_L030_C040
#812531
L: 30.13
a: 39.79
b: 15.25
λ*ext: 696 nm
λ*V2: 413.3 nm
H020_L030_C045
#861e2f
L: 30.15
a: 44.42
b: 16.73
λ*ext: 694 nm
λ*V2: 415.7 nm
H020_L030_C050
#8c142d
L: 30.14
a: 49.09
b: 18.16
λ*ext: 692 nm
λ*V2: 418 nm
H020_L030_C055
#91012b
L: 30.15
a: 53.76
b: 19.56
λ*ext: 689 nm
λ*V2: 420.8 nm
H020_L035_C005
#614d4b
L: 35.02
a: 8.06
b: 4.49
λ*ext: 698 nm
λ*V2: 411.5 nm
H020_L035_C010
#694a49
L: 35.04
a: 12.62
b: 6.09
λ*ext: 697 nm
λ*V2: 413 nm
H020_L035_C015
#704746
L: 35.05
a: 17.16
b: 7.7
λ*ext: 695 nm
λ*V2: 414.3 nm
H020_L035_C020
#764444
L: 35.07
a: 21.73
b: 9.29
λ*ext: 694 nm
λ*V2: 415.8 nm
H020_L035_C025
#7d4042
L: 35.08
a: 26.3
b: 10.91
λ*ext: 693 nm
λ*V2: 416.4 nm
H020_L035_C030
#833c40
L: 35.1
a: 30.89
b: 12.49
λ*ext: 692 nm
λ*V2: 417.7 nm
H020_L035_C035
#89373e
L: 35.12
a: 35.49
b: 14.03
λ*ext: 689 nm
λ*V2: 420.8 nm
H020_L035_C040
#8f323b
L: 35.13
a: 40.09
b: 15.63
λ*ext: 688 nm
λ*V2: 421.8 nm
H020_L035_C045
#952c39
L: 35.14
a: 44.71
b: 17.13
λ*ext: 686 nm
λ*V2: 424.2 nm
H020_L035_C050
#9b2438
L: 35.17
a: 49.36
b: 18.5
λ*ext: 681 nm
λ*V2: 428.9 nm
H020_L035_C055
#a11935
L: 35.17
a: 54.01
b: 20.03
λ*ext: 679 nm
λ*V2: 430.8 nm
H020_L035_C060
#a60734
L: 35.16
a: 58.71
b: 21.29
λ*ext: 675 nm
λ*V2: 435 nm
H020_L035_C065
#ac0032
L: 35.17
a: 63.36
b: 22.67
λ*ext: 671 nm
λ*V2: 438.5 nm
H020_L040_C005
#6e5956
L: 40.02
a: 8.42
b: 4.75
λ*ext: 688 nm
λ*V2: 421.3 nm
H020_L040_C010
#765654
L: 40.04
a: 12.96
b: 6.38
λ*ext: 687 nm
λ*V2: 422.6 nm
H020_L040_C015
#7d5352
L: 40.06
a: 17.5
b: 7.99
λ*ext: 685 nm
λ*V2: 424.7 nm
H020_L040_C020
#84504f
L: 40.07
a: 22.08
b: 9.58
λ*ext: 684 nm
λ*V2: 426 nm
H020_L040_C025
#8b4c4d
L: 40.08
a: 26.64
b: 11.2
λ*ext: 683 nm
λ*V2: 427 nm
H020_L040_C030
#92484b
L: 40.1
a: 31.23
b: 12.76
λ*ext: 681 nm
λ*V2: 428.7 nm
H020_L040_C035
#984348
L: 40.12
a: 35.82
b: 14.36
λ*ext: 679 nm
λ*V2: 430.8 nm
H020_L040_C040
#9e3e46
L: 40.14
a: 40.41
b: 15.92
λ*ext: 677 nm
λ*V2: 433 nm
H020_L040_C045
#a43944
L: 40.15
a: 45.03
b: 17.43
λ*ext: 674 nm
λ*V2: 435.7 nm
H020_L040_C050
#aa3242
L: 40.17
a: 49.65
b: 18.95
λ*ext: 671 nm
λ*V2: 439.2 nm
H020_L040_C055
#b02a40
L: 40.18
a: 54.28
b: 20.43
λ*ext: 667 nm
λ*V2: 442.6 nm
H020_L040_C060
#b61f3e
L: 40.19
a: 58.93
b: 21.85
λ*ext: 664 nm
λ*V2: 446.2 nm
H020_L040_C065
#bb0e3c
L: 40.18
a: 63.63
b: 23.17
λ*ext: 659 nm
λ*V2: 450.5 nm
H020_L040_C070
#c1003b
L: 40.19
a: 68.31
b: 24.47
λ*ext: 655 nm
λ*V2: 455.3 nm
H020_L045_C005
#7c6562
L: 45.02
a: 8.78
b: 5.01
λ*ext: 677 nm
λ*V2: 433 nm
H020_L045_C010
#846260
L: 45.03
a: 13.31
b: 6.64
λ*ext: 676 nm
λ*V2: 434.1 nm
H020_L045_C015
#8b5f5d
L: 45.05
a: 17.86
b: 8.24
λ*ext: 673 nm
λ*V2: 436.4 nm
H020_L045_C020
#925b5b
L: 45.07
a: 22.42
b: 9.85
λ*ext: 672 nm
λ*V2: 437.5 nm
H020_L045_C025
#995858
L: 45.08
a: 27
b: 11.43
λ*ext: 671 nm
λ*V2: 439.3 nm
H020_L045_C030
#a05456
L: 45.1
a: 31.58
b: 13
λ*ext: 668 nm
λ*V2: 442.2 nm
H020_L045_C035
#a75054
L: 45.12
a: 36.16
b: 14.6
λ*ext: 667 nm
λ*V2: 443.2 nm
H020_L045_C040
#ad4b51
L: 45.13
a: 40.75
b: 16.21
λ*ext: 664 nm
λ*V2: 445.7 nm
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