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.
#e29b6e
L: 70.01
a: 21.72
b: 33.96
λ*ext: 594 nm
λ*V2: 516.1 nm
#e69966
L: 70.02
a: 24.04
b: 38.16
λ*ext: 593 nm
λ*V2: 516.6 nm
#eb975f
L: 70.02
a: 26.37
b: 42.32
λ*ext: 592 nm
λ*V2: 517.8 nm
#f09557
L: 70.03
a: 28.7
b: 46.54
λ*ext: 593 nm
λ*V2: 516.9 nm
#f4934e
L: 70.03
a: 31.06
b: 50.76
λ*ext: 593 nm
λ*V2: 517.6 nm
#f89146
L: 70.04
a: 33.43
b: 54.95
λ*ext: 592 nm
λ*V2: 518.3 nm
#fc8e3d
L: 70.05
a: 35.79
b: 59.19
λ*ext: 591 nm
λ*V2: 519.2 nm
#ff8c33
L: 70.06
a: 38.18
b: 63.39
λ*ext: 591 nm
λ*V2: 519.6 nm
#ff8a28
L: 70.06
a: 40.58
b: 67.62
λ*ext: 588 nm
λ*V2: 521.8 nm
#ff871b
L: 70.07
a: 42.99
b: 71.83
λ*ext: 588 nm
λ*V2: 522.2 nm
#ff8505
L: 70.08
a: 45.4
b: 76.08
λ*ext: 586 nm
λ*V2: 523.8 nm
#ff8300
L: 70.09
a: 47.83
b: 80.25
λ*ext: 583 nm
λ*V2: 527 nm
#ff8000
L: 70.1
a: 50.26
b: 84.51
λ*ext: 583 nm
λ*V2: 527.2 nm
#ff7d00
L: 70.11
a: 52.7
b: 88.75
λ*ext: 582 nm
λ*V2: 528.7 nm
#cfb2a8
L: 75.01
a: 8.68
b: 8.92
λ*ext: 563 nm
λ*V2: 546.8 nm
#d5b1a1
L: 75.01
a: 10.83
b: 13.18
λ*ext: 564 nm
λ*V2: 545.5 nm
#dbaf99
L: 75.01
a: 13.03
b: 17.39
λ*ext: 567 nm
λ*V2: 543 nm
#e1ad91
L: 75.01
a: 15.27
b: 21.57
λ*ext: 567 nm
λ*V2: 543.1 nm
#e7ab8a
L: 75.01
a: 17.52
b: 25.76
λ*ext: 568 nm
λ*V2: 542.4 nm
#eca982
L: 75.01
a: 19.79
b: 29.97
λ*ext: 569 nm
λ*V2: 541.2 nm
#f1a87a
L: 75.01
a: 22.08
b: 34.12
λ*ext: 568 nm
λ*V2: 541.7 nm
#f6a673
L: 75.02
a: 24.37
b: 38.39
λ*ext: 569 nm
λ*V2: 541.1 nm
#fba46b
L: 75.02
a: 26.68
b: 42.6
λ*ext: 569 nm
λ*V2: 541.3 nm
#ffa263
L: 75.03
a: 29.02
b: 46.77
λ*ext: 568 nm
λ*V2: 541.7 nm
#ffa05b
L: 75.03
a: 31.36
b: 50.98
λ*ext: 568 nm
λ*V2: 541.9 nm
#ff9e52
L: 75.04
a: 33.72
b: 55.21
λ*ext: 568 nm
λ*V2: 541.7 nm
#ff9c49
L: 75.04
a: 36.07
b: 59.49
λ*ext: 567 nm
λ*V2: 543.4 nm
#ff9940
L: 75.05
a: 38.45
b: 63.69
λ*ext: 567 nm
λ*V2: 543.3 nm
#ff9736
L: 75.06
a: 40.84
b: 67.91
λ*ext: 565 nm
λ*V2: 545.2 nm
#ff952b
L: 75.07
a: 43.25
b: 72.07
λ*ext: 565 nm
λ*V2: 544.6 nm
#dec0b5
L: 80.01
a: 9.04
b: 9.2
λ*ext: 538 nm
λ*V2: 572.3 nm
#e4bead
L: 80.01
a: 11.19
b: 13.42
λ*ext: 538 nm
λ*V2: 572.2 nm
#eabca6
L: 80.01
a: 13.41
b: 17.58
λ*ext: 537 nm
λ*V2: 572.6 nm
#f0ba9e
L: 80.01
a: 15.65
b: 21.74
λ*ext: 538 nm
λ*V2: 571.7 nm
#f6b996
L: 80.01
a: 17.86
b: 26.04
λ*ext: 541 nm
λ*V2: 568.5 nm
#fcb78f
L: 80.01
a: 20.13
b: 30.22
λ*ext: 542 nm
λ*V2: 568.4 nm
#ffb587
L: 80.01
a: 22.42
b: 34.38
λ*ext: 542 nm
λ*V2: 568.3 nm
#ffb37f
L: 80.02
a: 24.71
b: 38.6
λ*ext: 541 nm
λ*V2: 568.4 nm
#ffb177
L: 80.02
a: 27.01
b: 42.83
λ*ext: 541 nm
λ*V2: 568.7 nm
#ffaf6f
L: 80.03
a: 29.33
b: 47.05
λ*ext: 541 nm
λ*V2: 568.6 nm
#ffad67
L: 80.03
a: 31.66
b: 51.27
λ*ext: 541 nm
λ*V2: 568.9 nm
#ffab5f
L: 80.03
a: 34.03
b: 55.37
λ*ext: 542 nm
λ*V2: 568 nm
#edcdc3
L: 85.01
a: 9.42
b: 9.41
λ*ext: 506 nm
λ*V2: 604.3 nm
#f3ccbb
L: 85.01
a: 11.58
b: 13.63
λ*ext: 507 nm
λ*V2: 603.2 nm
#facab3
L: 85.01
a: 13.77
b: 17.84
λ*ext: 508 nm
λ*V2: 602.4 nm
#ffc8ab
L: 85.01
a: 16
b: 22.02
λ*ext: 508 nm
λ*V2: 601.6 nm
#ffc6a3
L: 85.01
a: 18.23
b: 26.22
λ*ext: 509 nm
λ*V2: 601.4 nm
#ffc49c
L: 85.01
a: 20.48
b: 30.45
λ*ext: 510 nm
λ*V2: 599.8 nm
#ffc294
L: 85.01
a: 22.75
b: 34.67
λ*ext: 512 nm
λ*V2: 597.6 nm
#fcdbd0
L: 90.01
a: 9.78
b: 9.67
λ*ext: 472 nm
λ*V2: 637.9 nm
#ffd9c8
L: 90.01
a: 11.94
b: 13.87
λ*ext: 472 nm
λ*V2: 638 nm
#ffd8c0
L: 90.01
a: 14.13
b: 18.09
λ*ext: 475 nm
λ*V2: 635.6 nm
#231913
L: 10
a: 3.65
b: 5.64
λ*ext: 725 nm
λ*V2: 384.1 nm
#26180c
L: 10.01
a: 5.48
b: 9.81
λ*ext: 725 nm
λ*V2: 384.1 nm
#2e231d
L: 15
a: 3.99
b: 6.05
λ*ext: 722 nm
λ*V2: 387.2 nm
#322217
L: 15
a: 5.84
b: 10.46
λ*ext: 723 nm
λ*V2: 386.8 nm
#392d27
L: 19.99
a: 4.3
b: 6.4
λ*ext: 719 nm
λ*V2: 390.7 nm
#3e2c20
L: 20.01
a: 6.17
b: 10.73
λ*ext: 719 nm
λ*V2: 390.9 nm
#412b1a
L: 20
a: 8.09
b: 15.12
λ*ext: 719 nm
λ*V2: 390.6 nm
#452a13
L: 20
a: 10.03
b: 19.48
λ*ext: 719 nm
λ*V2: 390.1 nm
#463831
L: 25
a: 4.64
b: 6.7
λ*ext: 714 nm
λ*V2: 395.7 nm
#4a372a
L: 25
a: 6.49
b: 11.07
λ*ext: 714 nm
λ*V2: 395.9 nm
#4e3624
L: 25
a: 8.38
b: 15.46
λ*ext: 714 nm
λ*V2: 395.4 nm
#52341d
L: 25
a: 10.31
b: 19.82
λ*ext: 714 nm
λ*V2: 395.4 nm
#553316
L: 25
a: 12.28
b: 24.22
λ*ext: 714 nm
λ*V2: 395.5 nm
#58320e
L: 25.01
a: 14.26
b: 28.57
λ*ext: 714 nm
λ*V2: 395.6 nm
#52433c
L: 30
a: 4.99
b: 6.95
λ*ext: 707 nm
λ*V2: 402.5 nm
#574235
L: 30
a: 6.82
b: 11.36
λ*ext: 707 nm
λ*V2: 402.1 nm
#5b412e
L: 30
a: 8.7
b: 15.73
λ*ext: 708 nm
λ*V2: 401.7 nm
#5f3f27
L: 30
a: 10.62
b: 20.12
λ*ext: 708 nm
λ*V2: 401.7 nm
#623e20
L: 30
a: 12.56
b: 24.56
λ*ext: 708 nm
λ*V2: 401.3 nm
#663d19
L: 30.01
a: 14.53
b: 28.91
λ*ext: 708 nm
λ*V2: 401.9 nm
#693b10
L: 30.01
a: 16.51
b: 33.37
λ*ext: 708 nm
λ*V2: 401.6 nm
#6c3a06
L: 30.01
a: 18.54
b: 37.79
λ*ext: 707 nm
λ*V2: 402.4 nm
#5f4f47
L: 35
a: 5.34
b: 7.25
λ*ext: 700 nm
λ*V2: 410 nm
#634d40
L: 35
a: 7.15
b: 11.65
λ*ext: 700 nm
λ*V2: 409.9 nm
#684c39
L: 35
a: 9.01
b: 16.05
λ*ext: 700 nm
λ*V2: 409.8 nm
#6c4b32
L: 35
a: 10.93
b: 20.41
λ*ext: 700 nm
λ*V2: 409.2 nm
#70492a
L: 35
a: 12.85
b: 24.84
λ*ext: 700 nm
λ*V2: 409.3 nm
#734823
L: 35
a: 14.81
b: 29.23
λ*ext: 701 nm
λ*V2: 409 nm
#77461b
L: 35.01
a: 16.79
b: 33.64
λ*ext: 701 nm
λ*V2: 409 nm
#7a4512
L: 35.01
a: 18.8
b: 38.03
λ*ext: 700 nm
λ*V2: 409.5 nm
#7d4306
L: 35.02
a: 20.81
b: 42.47
λ*ext: 700 nm
λ*V2: 409.8 nm
#804200
L: 35.02
a: 22.84
b: 46.88
λ*ext: 699 nm
λ*V2: 410.9 nm
#6c5a52
L: 40
a: 5.68
b: 7.51
λ*ext: 690 nm
λ*V2: 419.9 nm
#71594b
L: 40.01
a: 7.49
b: 11.93
λ*ext: 690 nm
λ*V2: 419.8 nm
#755844
L: 40
a: 9.34
b: 16.35
λ*ext: 691 nm
λ*V2: 419 nm
#7a563c
L: 40
a: 11.24
b: 20.71
λ*ext: 691 nm
λ*V2: 418.7 nm
#7e5535
L: 40
a: 13.15
b: 25.13
λ*ext: 692 nm
λ*V2: 418.2 nm
#81532e
L: 40
a: 15.11
b: 29.49
λ*ext: 691 nm
λ*V2: 418.6 nm
#855226
L: 40.01
a: 17.08
b: 33.88
λ*ext: 691 nm
λ*V2: 418.9 nm
#88501e
L: 40.01
a: 19.07
b: 38.29
λ*ext: 691 nm
λ*V2: 418.5 nm
#8b4f14
L: 40.02
a: 21.07
b: 42.75
λ*ext: 691 nm
λ*V2: 418.8 nm
#8f4d07
L: 40.02
a: 23.08
b: 47.12
λ*ext: 691 nm
λ*V2: 418.9 nm
#924b00
L: 40.03
a: 25.13
b: 51.57
λ*ext: 690 nm
λ*V2: 420.2 nm
#79665d
L: 45
a: 6.03
b: 7.79
λ*ext: 679 nm
λ*V2: 431 nm
#7e6556
L: 45
a: 7.83
b: 12.22
λ*ext: 679 nm
λ*V2: 430.7 nm
#83644f
L: 45
a: 9.68
b: 16.61
λ*ext: 679 nm
λ*V2: 430.4 nm
#876248
L: 45
a: 11.58
b: 20.97
λ*ext: 680 nm
λ*V2: 429.9 nm
#8c6140
L: 45
a: 13.49
b: 25.37
λ*ext: 680 nm
λ*V2: 429.3 nm
