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.
#904c19
L: 40.03
a: 24.58
b: 40.87
λ*ext: 690 nm
λ*V2: 420.2 nm
#934a0f
L: 40.04
a: 26.98
b: 45.04
λ*ext: 689 nm
λ*V2: 421.2 nm
#974802
L: 40.05
a: 29.4
b: 49.31
λ*ext: 688 nm
λ*V2: 421.4 nm
#9a4600
L: 40.06
a: 31.81
b: 53.6
λ*ext: 688 nm
λ*V2: 422 nm
#9d4300
L: 40.08
a: 34.25
b: 57.61
λ*ext: 686 nm
λ*V2: 423.3 nm
#7a665e
L: 45.01
a: 6.46
b: 7.51
λ*ext: 677 nm
λ*V2: 432.7 nm
#7f6457
L: 45.01
a: 8.62
b: 11.82
λ*ext: 679 nm
λ*V2: 431 nm
#846350
L: 45.01
a: 10.87
b: 16
λ*ext: 679 nm
λ*V2: 430.8 nm
#896149
L: 45.01
a: 13.14
b: 20.19
λ*ext: 679 nm
λ*V2: 430.6 nm
#8e5f42
L: 45.01
a: 15.46
b: 24.34
λ*ext: 679 nm
λ*V2: 430.7 nm
#925e3b
L: 45.01
a: 17.79
b: 28.48
λ*ext: 678 nm
λ*V2: 431.8 nm
#975c34
L: 45.01
a: 20.13
b: 32.73
λ*ext: 680 nm
λ*V2: 430.2 nm
#9b5a2c
L: 45.02
a: 22.49
b: 36.91
λ*ext: 679 nm
λ*V2: 431.1 nm
#9e5824
L: 45.03
a: 24.85
b: 41.12
λ*ext: 679 nm
λ*V2: 431.3 nm
#a2561b
L: 45.04
a: 27.23
b: 45.37
λ*ext: 678 nm
λ*V2: 431.9 nm
#a65411
L: 45.05
a: 29.65
b: 49.48
λ*ext: 677 nm
λ*V2: 432.8 nm
#a95202
L: 45.06
a: 32.06
b: 53.74
λ*ext: 676 nm
λ*V2: 433.5 nm
#ad4f00
L: 45.07
a: 34.49
b: 57.97
λ*ext: 676 nm
λ*V2: 434.3 nm
#b04d00
L: 45.08
a: 36.92
b: 62.23
λ*ext: 675 nm
λ*V2: 435.3 nm
#877269
L: 50.01
a: 6.79
b: 7.84
λ*ext: 665 nm
λ*V2: 444.6 nm
#8d7163
L: 50.01
a: 8.99
b: 12.02
λ*ext: 665 nm
λ*V2: 445.1 nm
#926f5c
L: 50.01
a: 11.22
b: 16.23
λ*ext: 665 nm
λ*V2: 444.6 nm
#976d54
L: 50.01
a: 13.49
b: 20.42
λ*ext: 666 nm
λ*V2: 444.1 nm
#9c6c4d
L: 50.01
a: 15.78
b: 24.62
λ*ext: 666 nm
λ*V2: 443.3 nm
#a16a46
L: 50.01
a: 18.1
b: 28.76
λ*ext: 666 nm
λ*V2: 444.2 nm
#a5683f
L: 50.02
a: 20.42
b: 33.01
λ*ext: 666 nm
λ*V2: 443.4 nm
#a96637
L: 50.02
a: 22.77
b: 37.19
λ*ext: 667 nm
λ*V2: 443.2 nm
#ad6430
L: 50.03
a: 25.14
b: 41.35
λ*ext: 666 nm
λ*V2: 443.9 nm
#b16227
L: 50.03
a: 27.52
b: 45.58
λ*ext: 665 nm
λ*V2: 444.9 nm
#b5601e
L: 50.04
a: 29.91
b: 49.82
λ*ext: 665 nm
λ*V2: 445 nm
#b95e13
L: 50.05
a: 32.32
b: 54
λ*ext: 664 nm
λ*V2: 445.8 nm
#bc5c03
L: 50.06
a: 34.74
b: 58.15
λ*ext: 662 nm
λ*V2: 447.5 nm
#c05900
L: 50.07
a: 37.16
b: 62.42
λ*ext: 662 nm
λ*V2: 448.2 nm
#c35700
L: 50.08
a: 39.58
b: 66.68
λ*ext: 660 nm
λ*V2: 449.6 nm
#c75400
L: 50.09
a: 42.03
b: 70.87
λ*ext: 660 nm
λ*V2: 450.2 nm
#957f76
L: 55.01
a: 7.15
b: 8.07
λ*ext: 649 nm
λ*V2: 460.6 nm
#9b7d6e
L: 55.01
a: 9.34
b: 12.29
λ*ext: 650 nm
λ*V2: 459.9 nm
#a07b67
L: 55.01
a: 11.56
b: 16.51
λ*ext: 650 nm
λ*V2: 459.4 nm
#a67a60
L: 55.01
a: 13.84
b: 20.67
λ*ext: 651 nm
λ*V2: 458.9 nm
#ab7859
L: 55.01
a: 16.12
b: 24.85
λ*ext: 651 nm
λ*V2: 458.6 nm
#af7652
L: 55.01
a: 18.42
b: 29.04
λ*ext: 652 nm
λ*V2: 458.2 nm
#b4744a
L: 55.02
a: 20.74
b: 33.23
λ*ext: 650 nm
λ*V2: 459.4 nm
#b87243
L: 55.02
a: 23.07
b: 37.49
λ*ext: 652 nm
λ*V2: 458.2 nm
#bd703b
L: 55.03
a: 25.44
b: 41.62
λ*ext: 651 nm
λ*V2: 459 nm
#c16e33
L: 55.03
a: 27.81
b: 45.85
λ*ext: 651 nm
λ*V2: 459.1 nm
#c56c2a
L: 55.04
a: 30.18
b: 50.08
λ*ext: 650 nm
λ*V2: 459.8 nm
#c86a21
L: 55.05
a: 32.58
b: 54.25
λ*ext: 649 nm
λ*V2: 460.7 nm
#cc6815
L: 55.06
a: 34.98
b: 58.43
λ*ext: 648 nm
λ*V2: 461.7 nm
#d06603
L: 55.07
a: 37.4
b: 62.67
λ*ext: 647 nm
λ*V2: 462.8 nm
#d36300
L: 55.08
a: 39.82
b: 66.84
λ*ext: 646 nm
λ*V2: 464.4 nm
#d76100
L: 55.09
a: 42.25
b: 71.18
λ*ext: 645 nm
λ*V2: 464.9 nm
#da5e00
L: 55.1
a: 44.69
b: 75.49
λ*ext: 643 nm
λ*V2: 466.9 nm
#dd5b00
L: 55.11
a: 47.14
b: 79.59
λ*ext: 642 nm
λ*V2: 468.2 nm
#a38b82
L: 60.01
a: 7.52
b: 8.33
λ*ext: 632 nm
λ*V2: 477.5 nm
#a98a7b
L: 60.01
a: 9.7
b: 12.54
λ*ext: 632 nm
λ*V2: 477.5 nm
#af8873
L: 60.01
a: 11.92
b: 16.76
λ*ext: 634 nm
λ*V2: 476.3 nm
#b4866c
L: 60.01
a: 14.17
b: 20.94
λ*ext: 634 nm
λ*V2: 476 nm
#b98465
L: 60.01
a: 16.46
b: 25.1
λ*ext: 634 nm
λ*V2: 475.9 nm
#be835d
L: 60.01
a: 18.74
b: 29.33
λ*ext: 634 nm
λ*V2: 475.6 nm
#c38156
L: 60.02
a: 21.08
b: 33.4
λ*ext: 633 nm
λ*V2: 476.8 nm
#c87f4e
L: 60.02
a: 23.39
b: 37.67
λ*ext: 634 nm
λ*V2: 476.2 nm
#cc7d47
L: 60.02
a: 25.73
b: 41.87
λ*ext: 634 nm
λ*V2: 476.2 nm
#d07b3f
L: 60.03
a: 28.09
b: 46.08
λ*ext: 634 nm
λ*V2: 476.3 nm
#d47936
L: 60.04
a: 30.45
b: 50.34
λ*ext: 633 nm
λ*V2: 477.1 nm
#d8772d
L: 60.04
a: 32.85
b: 54.49
λ*ext: 633 nm
λ*V2: 477.4 nm
#dc7523
L: 60.05
a: 35.25
b: 58.65
λ*ext: 631 nm
λ*V2: 478.8 nm
#e07217
L: 60.06
a: 37.66
b: 62.89
λ*ext: 630 nm
λ*V2: 479.7 nm
#e47004
L: 60.07
a: 40.07
b: 67.14
λ*ext: 629 nm
λ*V2: 480.8 nm
#e76e00
L: 60.08
a: 42.5
b: 71.34
λ*ext: 628 nm
λ*V2: 481.8 nm
#eb6b00
L: 60.09
a: 44.93
b: 75.56
λ*ext: 627 nm
λ*V2: 483.2 nm
#ee6800
L: 60.11
a: 47.36
b: 79.81
λ*ext: 625 nm
λ*V2: 484.7 nm
#f26600
L: 60.12
a: 49.8
b: 84.12
λ*ext: 623 nm
λ*V2: 487 nm
#f56300
L: 60.13
a: 52.26
b: 88.24
λ*ext: 621 nm
λ*V2: 488.7 nm
#b1988e
L: 65.01
a: 7.89
b: 8.55
λ*ext: 612 nm
λ*V2: 497.5 nm
#b89687
L: 65.01
a: 10.07
b: 12.75
λ*ext: 612 nm
λ*V2: 497.4 nm
#bd9580
L: 65.01
a: 12.29
b: 16.96
λ*ext: 613 nm
λ*V2: 496.5 nm
#c39378
L: 65.01
a: 14.53
b: 21.17
λ*ext: 614 nm
λ*V2: 495.4 nm
#c89171
L: 65.01
a: 16.82
b: 25.28
λ*ext: 613 nm
λ*V2: 496.8 nm
#cd8f69
L: 65.01
a: 19.09
b: 29.52
λ*ext: 615 nm
λ*V2: 495.3 nm
#d28e62
L: 65.02
a: 21.41
b: 33.67
λ*ext: 614 nm
λ*V2: 496.2 nm
#d78c5a
L: 65.02
a: 23.71
b: 37.92
λ*ext: 615 nm
λ*V2: 494.6 nm
#db8a53
L: 65.02
a: 26.05
b: 42.12
λ*ext: 615 nm
λ*V2: 494.6 nm
#e0884b
L: 65.03
a: 28.4
b: 46.31
λ*ext: 615 nm
λ*V2: 495.5 nm
#e48642
L: 65.04
a: 30.75
b: 50.54
λ*ext: 614 nm
λ*V2: 495.9 nm
#e8843a
L: 65.04
a: 33.13
b: 54.76
λ*ext: 613 nm
λ*V2: 496.8 nm
#ec8130
L: 65.05
a: 35.52
b: 58.94
λ*ext: 614 nm
λ*V2: 496.4 nm
#f07f26
L: 65.06
a: 37.92
b: 63.09
λ*ext: 611 nm
λ*V2: 499 nm
#f47d19
L: 65.07
a: 40.32
b: 67.37
λ*ext: 611 nm
λ*V2: 499.3 nm
#f87a04
L: 65.08
a: 42.73
b: 71.64
λ*ext: 610 nm
λ*V2: 500.5 nm
#fb7800
L: 65.09
a: 45.16
b: 75.75
λ*ext: 608 nm
λ*V2: 502.1 nm
#ff7500
L: 65.1
a: 47.59
b: 80.07
λ*ext: 606 nm
λ*V2: 503.8 nm
#ff7300
L: 65.11
a: 50.02
b: 84.36
λ*ext: 603 nm
λ*V2: 507.2 nm
#ff7000
L: 65.12
a: 52.47
b: 88.63
λ*ext: 602 nm
λ*V2: 508.2 nm
#ff6d00
L: 65.13
a: 54.92
b: 92.83
λ*ext: 601 nm
λ*V2: 509.7 nm
#c0a59b
L: 70.01
a: 8.27
b: 8.77
λ*ext: 591 nm
λ*V2: 519.1 nm
#c6a394
L: 70.01
a: 10.45
b: 12.98
λ*ext: 591 nm
λ*V2: 519.2 nm
#cca28c
L: 70.01
a: 12.66
b: 17.17
λ*ext: 591 nm
λ*V2: 518.5 nm
#d2a085
L: 70.01
a: 14.9
b: 21.37
λ*ext: 592 nm
λ*V2: 517.7 nm
#d79e7d
L: 70.01
a: 17.18
b: 25.51
λ*ext: 591 nm
λ*V2: 518.5 nm
#dd9c76
L: 70.01
a: 19.44
b: 29.74
λ*ext: 593 nm
λ*V2: 517.4 nm
