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.
#ff5435
L: 60.19
a: 64.03
b: 53.27
λ*ext: 602 nm
λ*V2: 508.7 nm
#ff4d2f
L: 60.2
a: 67.77
b: 56.36
λ*ext: 595 nm
λ*V2: 514.8 nm
#ff462a
L: 60.21
a: 71.55
b: 59.15
λ*ext: 593 nm
λ*V2: 517 nm
#b39790
L: 65.01
a: 9.29
b: 7.44
λ*ext: 611 nm
λ*V2: 498.8 nm
#bb958b
L: 65.02
a: 12.85
b: 10.55
λ*ext: 610 nm
λ*V2: 500.3 nm
#c29286
L: 65.03
a: 16.45
b: 13.64
λ*ext: 609 nm
λ*V2: 501.1 nm
#ca8f81
L: 65.04
a: 20.08
b: 16.69
λ*ext: 608 nm
λ*V2: 502.3 nm
#d18d7b
L: 65.05
a: 23.72
b: 19.76
λ*ext: 607 nm
λ*V2: 503.1 nm
#d78a76
L: 65.06
a: 27.37
b: 22.8
λ*ext: 604 nm
λ*V2: 505.7 nm
#de8771
L: 65.07
a: 31.02
b: 25.9
λ*ext: 604 nm
λ*V2: 506.2 nm
#e4836c
L: 65.08
a: 34.68
b: 29
λ*ext: 603 nm
λ*V2: 507.3 nm
#ea8066
L: 65.09
a: 38.36
b: 32.07
λ*ext: 601 nm
λ*V2: 509.5 nm
#f07c61
L: 65.1
a: 42.04
b: 35.15
λ*ext: 600 nm
λ*V2: 510.3 nm
#f6795c
L: 65.12
a: 45.74
b: 38.2
λ*ext: 596 nm
λ*V2: 513.9 nm
#fc7556
L: 65.13
a: 49.43
b: 41.29
λ*ext: 594 nm
λ*V2: 515.9 nm
#ff7151
L: 65.14
a: 53.14
b: 44.33
λ*ext: 590 nm
λ*V2: 519.8 nm
#ff6c4c
L: 65.16
a: 56.86
b: 47.4
λ*ext: 587 nm
λ*V2: 523.5 nm
#ff6746
L: 65.17
a: 60.58
b: 50.49
λ*ext: 583 nm
λ*V2: 526.9 nm
#c2a49d
L: 70.02
a: 9.68
b: 7.64
λ*ext: 588 nm
λ*V2: 522 nm
#caa298
L: 70.02
a: 13.23
b: 10.77
λ*ext: 588 nm
λ*V2: 522.4 nm
#d19f92
L: 70.03
a: 16.83
b: 13.85
λ*ext: 587 nm
λ*V2: 523.3 nm
#d99c8d
L: 70.04
a: 20.45
b: 16.91
λ*ext: 585 nm
λ*V2: 524.9 nm
#e09a88
L: 70.04
a: 24.07
b: 20.03
λ*ext: 585 nm
λ*V2: 524.6 nm
#e79782
L: 70.05
a: 27.7
b: 23.11
λ*ext: 584 nm
λ*V2: 525.8 nm
#ed947d
L: 70.07
a: 31.37
b: 26.12
λ*ext: 581 nm
λ*V2: 529.4 nm
#f49078
L: 70.08
a: 35.03
b: 29.18
λ*ext: 579 nm
λ*V2: 531.5 nm
#fa8d72
L: 70.09
a: 38.69
b: 32.31
λ*ext: 577 nm
λ*V2: 532.7 nm
#ff8a6d
L: 70.1
a: 42.36
b: 35.4
λ*ext: 575 nm
λ*V2: 535.2 nm
#ff8668
L: 70.11
a: 46.06
b: 38.47
λ*ext: 574 nm
λ*V2: 536.4 nm
#ff8262
L: 70.12
a: 49.74
b: 41.56
λ*ext: 570 nm
λ*V2: 540.2 nm
#ff7e5d
L: 70.14
a: 53.46
b: 44.58
λ*ext: 566 nm
λ*V2: 543.7 nm
#d1b1aa
L: 75.01
a: 10.06
b: 7.84
λ*ext: 562 nm
λ*V2: 547.6 nm
#d9afa5
L: 75.02
a: 13.61
b: 10.98
λ*ext: 562 nm
λ*V2: 547.9 nm
#e0ac9f
L: 75.03
a: 17.21
b: 14.05
λ*ext: 561 nm
λ*V2: 549.4 nm
#e8aa9a
L: 75.04
a: 20.81
b: 17.15
λ*ext: 561 nm
λ*V2: 549.2 nm
#efa794
L: 75.04
a: 24.44
b: 20.22
λ*ext: 559 nm
λ*V2: 551 nm
#f6a48f
L: 75.05
a: 28.07
b: 23.29
λ*ext: 557 nm
λ*V2: 553 nm
#fda189
L: 75.06
a: 31.7
b: 26.43
λ*ext: 556 nm
λ*V2: 554.3 nm
#ff9e84
L: 75.07
a: 35.35
b: 29.5
λ*ext: 554 nm
λ*V2: 556 nm
#ff9a7f
L: 75.09
a: 39.03
b: 32.55
λ*ext: 552 nm
λ*V2: 558.2 nm
#ff9779
L: 75.1
a: 42.7
b: 35.62
λ*ext: 549 nm
λ*V2: 561.1 nm
#dfbfb7
L: 80.01
a: 10.44
b: 8.07
λ*ext: 534 nm
λ*V2: 575.7 nm
#e8bcb2
L: 80.02
a: 13.99
b: 11.19
λ*ext: 533 nm
λ*V2: 576.6 nm
#f0baac
L: 80.03
a: 17.58
b: 14.28
λ*ext: 532 nm
λ*V2: 578.2 nm
#f7b7a7
L: 80.04
a: 21.19
b: 17.35
λ*ext: 531 nm
λ*V2: 579.1 nm
#ffb4a1
L: 80.04
a: 24.8
b: 20.44
λ*ext: 531 nm
λ*V2: 579.1 nm
#ffb19c
L: 80.05
a: 28.43
b: 23.52
λ*ext: 528 nm
λ*V2: 582.1 nm
#ffae96
L: 80.06
a: 32.05
b: 26.64
λ*ext: 527 nm
λ*V2: 582.6 nm
#ffab91
L: 80.07
a: 35.7
b: 29.73
λ*ext: 527 nm
λ*V2: 583.3 nm
#efccc5
L: 85.01
a: 10.82
b: 8.29
λ*ext: 503 nm
λ*V2: 607.2 nm
#f7cabf
L: 85.02
a: 14.37
b: 11.41
λ*ext: 502 nm
λ*V2: 608 nm
#ffc7b9
L: 85.03
a: 17.95
b: 14.51
λ*ext: 501 nm
λ*V2: 609.3 nm
#ffc4b4
L: 85.04
a: 21.55
b: 17.59
λ*ext: 499 nm
λ*V2: 610.9 nm
#ffc2ae
L: 85.04
a: 25.16
b: 20.71
λ*ext: 500 nm
λ*V2: 609.5 nm
#fedad2
L: 90.01
a: 11.18
b: 8.54
λ*ext: 470 nm
λ*V2: 640.7 nm
#ffd8cc
L: 90.02
a: 14.73
b: 11.67
λ*ext: 468 nm
λ*V2: 642.5 nm
#1a0d09
L: 4.99
a: 4.47
b: 3.86
λ*ext: 727 nm
λ*V2: 382.3 nm
#241815
L: 10.02
a: 5.09
b: 4.81
λ*ext: 725 nm
λ*V2: 384.6 nm
#291610
L: 10.01
a: 8.47
b: 7.91
λ*ext: 725 nm
λ*V2: 384.3 nm
#2f221e
L: 15.01
a: 5.45
b: 5.12
λ*ext: 722 nm
λ*V2: 387.3 nm
#35201a
L: 15.01
a: 8.79
b: 8.45
λ*ext: 722 nm
λ*V2: 387.6 nm
#391e15
L: 15.02
a: 12.13
b: 11.87
λ*ext: 722 nm
λ*V2: 387.7 nm
#3e1c10
L: 15.03
a: 15.5
b: 15.16
λ*ext: 722 nm
λ*V2: 387.7 nm
#42190a
L: 15.05
a: 18.89
b: 18.34
λ*ext: 721 nm
λ*V2: 388.4 nm
#3b2d28
L: 20.01
a: 5.8
b: 5.33
λ*ext: 718 nm
λ*V2: 392 nm
#412b23
L: 20.02
a: 9.07
b: 8.83
λ*ext: 718 nm
λ*V2: 391.1 nm
#46281f
L: 20.03
a: 12.42
b: 12.19
λ*ext: 717 nm
λ*V2: 392.2 nm
#4b261a
L: 20.03
a: 15.82
b: 15.58
λ*ext: 718 nm
λ*V2: 391.8 nm
#4f2315
L: 20.04
a: 19.22
b: 18.95
λ*ext: 717 nm
λ*V2: 392.2 nm
#532010
L: 20.05
a: 22.63
b: 22.37
λ*ext: 717 nm
λ*V2: 392.8 nm
#581d0a
L: 20.07
a: 26.03
b: 25.59
λ*ext: 716 nm
λ*V2: 393.7 nm
#473733
L: 25.01
a: 6.12
b: 5.68
λ*ext: 713 nm
λ*V2: 396.3 nm
#4d352e
L: 25.02
a: 9.43
b: 9.03
λ*ext: 712 nm
λ*V2: 397.6 nm
#523329
L: 25.02
a: 12.75
b: 12.49
λ*ext: 713 nm
λ*V2: 396.8 nm
#583124
L: 25.03
a: 16.14
b: 15.81
λ*ext: 711 nm
λ*V2: 398.3 nm
#5c2e1f
L: 25.04
a: 19.52
b: 19.26
λ*ext: 712 nm
λ*V2: 397.3 nm
#612b1a
L: 25.05
a: 22.92
b: 22.67
λ*ext: 711 nm
λ*V2: 398.2 nm
#662814
L: 25.07
a: 26.35
b: 26.04
λ*ext: 711 nm
λ*V2: 398.9 nm
#6a250f
L: 25.08
a: 29.77
b: 29.41
λ*ext: 710 nm
λ*V2: 399.7 nm
#6e2008
L: 25.1
a: 33.19
b: 32.89
λ*ext: 709 nm
λ*V2: 400.9 nm
#54423d
L: 30.01
a: 6.46
b: 5.98
λ*ext: 707 nm
λ*V2: 403 nm
#5a4038
L: 30.02
a: 9.74
b: 9.4
λ*ext: 706 nm
λ*V2: 403.2 nm
#603e33
L: 30.03
a: 13.08
b: 12.8
λ*ext: 706 nm
λ*V2: 403.1 nm
#653c2e
L: 30.03
a: 16.43
b: 16.22
λ*ext: 706 nm
λ*V2: 403.5 nm
#6a3929
L: 30.04
a: 19.84
b: 19.52
λ*ext: 706 nm
λ*V2: 403.9 nm
#6f3624
L: 30.05
a: 23.2
b: 23
λ*ext: 705 nm
λ*V2: 404.7 nm
#74331e
L: 30.07
a: 26.62
b: 26.34
λ*ext: 704 nm
λ*V2: 405.8 nm
#783019
L: 30.08
a: 30.05
b: 29.69
λ*ext: 703 nm
λ*V2: 406.6 nm
#7d2c13
L: 30.09
a: 33.47
b: 33.14
λ*ext: 702 nm
λ*V2: 408 nm
#81280d
L: 30.11
a: 36.91
b: 36.65
λ*ext: 700 nm
λ*V2: 409.6 nm
#852305
L: 30.11
a: 40.38
b: 40.05
λ*ext: 699 nm
λ*V2: 410.9 nm
#604e48
L: 35.01
a: 6.81
b: 6.25
λ*ext: 699 nm
λ*V2: 410.7 nm
#674c43
L: 35.02
a: 10.07
b: 9.71
λ*ext: 698 nm
λ*V2: 411.2 nm
#6d493e
L: 35.02
a: 13.41
b: 13.08
λ*ext: 698 nm
λ*V2: 411.7 nm
#724738
L: 35.03
a: 16.75
b: 16.49
λ*ext: 698 nm
λ*V2: 411.7 nm
#784533
L: 35.04
a: 20.12
b: 19.86
λ*ext: 697 nm
λ*V2: 412.8 nm
#7d422e
L: 35.05
a: 23.53
b: 23.21
λ*ext: 696 nm
λ*V2: 413.6 nm
#823f29
L: 35.06
a: 26.92
b: 26.62
λ*ext: 696 nm
λ*V2: 414.1 nm
#873c23
L: 35.07
a: 30.34
b: 30
λ*ext: 695 nm
λ*V2: 414.5 nm
#8b381e
L: 35.09
a: 33.75
b: 33.39
λ*ext: 694 nm
λ*V2: 415.8 nm
