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.
#d38c6f
L: 65.03
a: 23.5
b: 26.52
λ*ext: 610 nm
λ*V2: 499.5 nm
#d98a69
L: 65.04
a: 26.53
b: 30.17
λ*ext: 608 nm
λ*V2: 501.5 nm
#de8762
L: 65.05
a: 29.57
b: 33.86
λ*ext: 608 nm
λ*V2: 501.9 nm
#e4855c
L: 65.06
a: 32.62
b: 37.54
λ*ext: 607 nm
λ*V2: 503.2 nm
#e98255
L: 65.07
a: 35.68
b: 41.29
λ*ext: 608 nm
λ*V2: 502.4 nm
#ee7f4e
L: 65.08
a: 38.76
b: 44.97
λ*ext: 606 nm
λ*V2: 504.4 nm
#f37c47
L: 65.09
a: 41.83
b: 48.7
λ*ext: 604 nm
λ*V2: 505.9 nm
#f87940
L: 65.1
a: 44.94
b: 52.33
λ*ext: 602 nm
λ*V2: 508.5 nm
#fd7639
L: 65.11
a: 48.04
b: 56
λ*ext: 599 nm
λ*V2: 511 nm
#ff7231
L: 65.12
a: 51.14
b: 59.77
λ*ext: 598 nm
λ*V2: 512.5 nm
#ff6e29
L: 65.14
a: 54.26
b: 63.45
λ*ext: 595 nm
λ*V2: 515.4 nm
#ff6b1f
L: 65.15
a: 57.38
b: 67.24
λ*ext: 592 nm
λ*V2: 518.2 nm
#ff6613
L: 65.16
a: 60.52
b: 70.87
λ*ext: 588 nm
λ*V2: 522.3 nm
#c1a59c
L: 70.01
a: 9.01
b: 8.29
λ*ext: 590 nm
λ*V2: 519.8 nm
#c8a296
L: 70.02
a: 11.95
b: 11.93
λ*ext: 587 nm
λ*V2: 522.6 nm
#cfa08f
L: 70.02
a: 14.88
b: 15.68
λ*ext: 589 nm
λ*V2: 521.1 nm
#d69e88
L: 70.02
a: 17.85
b: 19.4
λ*ext: 590 nm
λ*V2: 520.4 nm
#dc9c82
L: 70.03
a: 20.85
b: 23.03
λ*ext: 588 nm
λ*V2: 521.6 nm
#e2997b
L: 70.03
a: 23.85
b: 26.73
λ*ext: 588 nm
λ*V2: 521.9 nm
#e89775
L: 70.04
a: 26.87
b: 30.41
λ*ext: 587 nm
λ*V2: 522.7 nm
#ee946e
L: 70.05
a: 29.9
b: 34.14
λ*ext: 587 nm
λ*V2: 522.7 nm
#f39268
L: 70.05
a: 32.94
b: 37.85
λ*ext: 587 nm
λ*V2: 523.5 nm
#f98f61
L: 70.06
a: 36.01
b: 41.46
λ*ext: 584 nm
λ*V2: 525.8 nm
#fe8c5a
L: 70.07
a: 39.06
b: 45.25
λ*ext: 584 nm
λ*V2: 526.4 nm
#ff8953
L: 70.08
a: 42.14
b: 48.92
λ*ext: 581 nm
λ*V2: 528.7 nm
#ff864c
L: 70.1
a: 45.23
b: 52.59
λ*ext: 577 nm
λ*V2: 532.8 nm
#ff8345
L: 70.11
a: 48.32
b: 56.33
λ*ext: 576 nm
λ*V2: 533.6 nm
#ff7f3d
L: 70.12
a: 51.42
b: 60.03
λ*ext: 574 nm
λ*V2: 536 nm
#d0b2a9
L: 75.01
a: 9.4
b: 8.49
λ*ext: 565 nm
λ*V2: 545 nm
#d7b0a2
L: 75.02
a: 12.31
b: 12.18
λ*ext: 563 nm
λ*V2: 546.6 nm
#dead9c
L: 75.02
a: 15.25
b: 15.9
λ*ext: 564 nm
λ*V2: 546.4 nm
#e5ab95
L: 75.02
a: 18.22
b: 19.57
λ*ext: 564 nm
λ*V2: 546 nm
#eba98f
L: 75.03
a: 21.21
b: 23.26
λ*ext: 563 nm
λ*V2: 546.5 nm
#f2a688
L: 75.03
a: 24.2
b: 26.96
λ*ext: 563 nm
λ*V2: 547.2 nm
#f8a481
L: 75.04
a: 27.21
b: 30.66
λ*ext: 562 nm
λ*V2: 547.5 nm
#fea17b
L: 75.04
a: 30.22
b: 34.42
λ*ext: 562 nm
λ*V2: 547.5 nm
#ff9f74
L: 75.05
a: 33.27
b: 38.07
λ*ext: 560 nm
λ*V2: 549.8 nm
#ff9c6d
L: 75.06
a: 36.32
b: 41.75
λ*ext: 558 nm
λ*V2: 551.5 nm
#ff9966
L: 75.07
a: 39.37
b: 45.48
λ*ext: 558 nm
λ*V2: 551.8 nm
#ff965f
L: 75.08
a: 42.45
b: 49.17
λ*ext: 556 nm
λ*V2: 553.7 nm
#ff9359
L: 75.09
a: 45.55
b: 52.74
λ*ext: 556 nm
λ*V2: 554.3 nm
#dfbfb6
L: 80.01
a: 9.79
b: 8.68
λ*ext: 536 nm
λ*V2: 574 nm
#e6bdaf
L: 80.02
a: 12.68
b: 12.43
λ*ext: 536 nm
λ*V2: 574.5 nm
#edbba9
L: 80.02
a: 15.63
b: 16.09
λ*ext: 535 nm
λ*V2: 575.5 nm
#f4b9a2
L: 80.02
a: 18.58
b: 19.82
λ*ext: 536 nm
λ*V2: 574 nm
#fbb69b
L: 80.03
a: 21.57
b: 23.5
λ*ext: 536 nm
λ*V2: 574.2 nm
#ffb495
L: 80.03
a: 24.55
b: 27.21
λ*ext: 535 nm
λ*V2: 575.2 nm
#ffb18e
L: 80.04
a: 27.55
b: 30.92
λ*ext: 535 nm
λ*V2: 574.8 nm
#ffaf87
L: 80.04
a: 30.57
b: 34.62
λ*ext: 533 nm
λ*V2: 576.4 nm
#ffac80
L: 80.05
a: 33.59
b: 38.35
λ*ext: 533 nm
λ*V2: 577.1 nm
#eecdc4
L: 85.01
a: 10.16
b: 8.91
λ*ext: 504 nm
λ*V2: 605.9 nm
#f5cbbd
L: 85.02
a: 13.06
b: 12.64
λ*ext: 504 nm
λ*V2: 605.7 nm
#fdc8b6
L: 85.02
a: 16.01
b: 16.29
λ*ext: 503 nm
λ*V2: 607.2 nm
#ffc6af
L: 85.02
a: 18.95
b: 20.04
λ*ext: 505 nm
λ*V2: 605.5 nm
#ffc4a8
L: 85.03
a: 21.92
b: 23.74
λ*ext: 504 nm
λ*V2: 606.1 nm
#ffc1a2
L: 85.03
a: 24.91
b: 27.44
λ*ext: 505 nm
λ*V2: 604.5 nm
#fddbd1
L: 90.01
a: 10.54
b: 9.13
λ*ext: 469 nm
λ*V2: 641 nm
#ffd8ca
L: 90.02
a: 13.44
b: 12.85
λ*ext: 469 nm
λ*V2: 640.9 nm
#231914
L: 10
a: 4.42
b: 5.28
λ*ext: 725 nm
λ*V2: 384.2 nm
#28170e
L: 10
a: 7.07
b: 8.92
λ*ext: 725 nm
λ*V2: 384.2 nm
#2f231d
L: 15.01
a: 4.73
b: 5.65
λ*ext: 722 nm
λ*V2: 387.3 nm
#332118
L: 15
a: 7.37
b: 9.6
λ*ext: 723 nm
λ*V2: 387 nm
#371f12
L: 15.01
a: 10.06
b: 13.52
λ*ext: 723 nm
λ*V2: 386.9 nm
#3a2d27
L: 20
a: 5.08
b: 5.94
λ*ext: 718 nm
λ*V2: 391.2 nm
#3f2b22
L: 20.01
a: 7.71
b: 9.89
λ*ext: 718 nm
λ*V2: 391.2 nm
#442a1c
L: 20.02
a: 10.36
b: 13.83
λ*ext: 718 nm
λ*V2: 391.8 nm
#482816
L: 20.01
a: 13.07
b: 17.78
λ*ext: 719 nm
λ*V2: 391 nm
#4c2610
L: 20.03
a: 15.78
b: 21.78
λ*ext: 718 nm
λ*V2: 391.1 nm
#463832
L: 25.01
a: 5.43
b: 6.24
λ*ext: 713 nm
λ*V2: 396.2 nm
#4c362c
L: 25.01
a: 8.03
b: 10.2
λ*ext: 713 nm
λ*V2: 396.4 nm
#503426
L: 25.01
a: 10.71
b: 14.11
λ*ext: 713 nm
λ*V2: 396.6 nm
#553220
L: 25.02
a: 13.38
b: 18.11
λ*ext: 713 nm
λ*V2: 396.3 nm
#59311a
L: 25.02
a: 16.1
b: 22.03
λ*ext: 713 nm
λ*V2: 396.4 nm
#5d2e14
L: 25.03
a: 18.84
b: 25.98
λ*ext: 713 nm
λ*V2: 396.7 nm
#612c0c
L: 25.05
a: 21.56
b: 30.05
λ*ext: 712 nm
λ*V2: 397.2 nm
#53433c
L: 30.01
a: 5.75
b: 6.55
λ*ext: 707 nm
λ*V2: 402.2 nm
#584136
L: 30.01
a: 8.36
b: 10.51
λ*ext: 707 nm
λ*V2: 402.6 nm
#5d3f30
L: 30.01
a: 11
b: 14.46
λ*ext: 707 nm
λ*V2: 402.3 nm
#623d2a
L: 30.02
a: 13.69
b: 18.4
λ*ext: 707 nm
λ*V2: 402.4 nm
#663c24
L: 30.02
a: 16.39
b: 22.32
λ*ext: 706 nm
λ*V2: 403.2 nm
#6b391e
L: 30.03
a: 19.12
b: 26.29
λ*ext: 706 nm
λ*V2: 403.3 nm
#6f3717
L: 30.04
a: 21.86
b: 30.24
λ*ext: 706 nm
λ*V2: 403.7 nm
#723510
L: 30.05
a: 24.61
b: 34.23
λ*ext: 705 nm
λ*V2: 404.2 nm
#763207
L: 30.06
a: 27.39
b: 38.18
λ*ext: 705 nm
λ*V2: 404.7 nm
#7a3000
L: 30.08
a: 30.16
b: 41.98
λ*ext: 704 nm
λ*V2: 406 nm
#604e47
L: 35.01
a: 6.12
b: 6.8
λ*ext: 699 nm
λ*V2: 410.5 nm
#654c41
L: 35.01
a: 8.71
b: 10.77
λ*ext: 699 nm
λ*V2: 410.7 nm
#6b4b3b
L: 35.01
a: 11.35
b: 14.71
λ*ext: 699 nm
λ*V2: 410.5 nm
#6f4935
L: 35.01
a: 14.01
b: 18.69
λ*ext: 700 nm
λ*V2: 410.1 nm
#74472e
L: 35.02
a: 16.71
b: 22.62
λ*ext: 699 nm
λ*V2: 410.5 nm
#794528
L: 35.03
a: 19.42
b: 26.56
λ*ext: 699 nm
λ*V2: 411 nm
#7d4322
L: 35.04
a: 22.16
b: 30.47
λ*ext: 698 nm
λ*V2: 411.9 nm
#81401a
L: 35.05
a: 24.89
b: 34.48
λ*ext: 698 nm
λ*V2: 412 nm
#853e13
L: 35.06
a: 27.65
b: 38.47
λ*ext: 697 nm
λ*V2: 412.5 nm
#883b09
L: 35.07
a: 30.43
b: 42.45
λ*ext: 696 nm
λ*V2: 413.6 nm
#8c3800
L: 35.08
a: 33.21
b: 46.49
λ*ext: 695 nm
λ*V2: 414.5 nm
#903500
L: 35.09
a: 36
b: 50.28
λ*ext: 694 nm
λ*V2: 415.6 nm
#6d5a53
L: 40.01
a: 6.46
b: 7.07
λ*ext: 689 nm
λ*V2: 420.5 nm
#73584c
L: 40.01
a: 9.03
b: 11.08
λ*ext: 689 nm
λ*V2: 420.3 nm
#785646
L: 40.01
a: 11.67
b: 14.99
λ*ext: 689 nm
λ*V2: 420.6 nm
