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.
#fa5a4a
L: 60.18
a: 60.41
b: 42.26
λ*ext: 602 nm
λ*V2: 508.7 nm
#ff5345
L: 60.19
a: 64.4
b: 45.01
λ*ext: 598 nm
λ*V2: 511.7 nm
#ff4d41
L: 60.2
a: 68.41
b: 47.74
λ*ext: 592 nm
λ*V2: 517.8 nm
#b39791
L: 65.01
a: 9.57
b: 7.11
λ*ext: 611 nm
λ*V2: 498.8 nm
#bc948c
L: 65.03
a: 13.43
b: 9.86
λ*ext: 609 nm
λ*V2: 500.9 nm
#c39288
L: 65.04
a: 17.3
b: 12.62
λ*ext: 608 nm
λ*V2: 502 nm
#cb8f83
L: 65.05
a: 21.21
b: 15.33
λ*ext: 606 nm
λ*V2: 503.6 nm
#d28c7e
L: 65.05
a: 25.13
b: 18.05
λ*ext: 605 nm
λ*V2: 504.9 nm
#d9897a
L: 65.07
a: 29.05
b: 20.79
λ*ext: 603 nm
λ*V2: 507.1 nm
#e08575
L: 65.08
a: 32.98
b: 23.53
λ*ext: 602 nm
λ*V2: 508.3 nm
#e68271
L: 65.09
a: 36.93
b: 26.22
λ*ext: 599 nm
λ*V2: 511.1 nm
#ed7e6c
L: 65.11
a: 40.88
b: 28.93
λ*ext: 596 nm
λ*V2: 514 nm
#f37a67
L: 65.12
a: 44.82
b: 31.71
λ*ext: 595 nm
λ*V2: 515.5 nm
#f97663
L: 65.13
a: 48.78
b: 34.43
λ*ext: 591 nm
λ*V2: 519.1 nm
#ff715e
L: 65.15
a: 52.75
b: 37.17
λ*ext: 589 nm
λ*V2: 521.3 nm
#ff6d5a
L: 65.16
a: 56.72
b: 39.93
λ*ext: 586 nm
λ*V2: 524.2 nm
#ff6755
L: 65.18
a: 60.7
b: 42.61
λ*ext: 580 nm
λ*V2: 529.9 nm
#ff6251
L: 65.19
a: 64.7
b: 45.3
λ*ext: 579 nm
λ*V2: 531.5 nm
#c2a49e
L: 70.02
a: 9.96
b: 7.31
λ*ext: 589 nm
λ*V2: 521.3 nm
#caa199
L: 70.03
a: 13.8
b: 10.08
λ*ext: 586 nm
λ*V2: 523.8 nm
#d29f94
L: 70.04
a: 17.68
b: 12.82
λ*ext: 585 nm
λ*V2: 524.9 nm
#da9c90
L: 70.05
a: 21.59
b: 15.54
λ*ext: 584 nm
λ*V2: 526.1 nm
#e1998b
L: 70.06
a: 25.51
b: 18.24
λ*ext: 581 nm
λ*V2: 528.7 nm
#e89586
L: 70.07
a: 29.4
b: 21.03
λ*ext: 580 nm
λ*V2: 530.1 nm
#ef9282
L: 70.08
a: 33.34
b: 23.72
λ*ext: 578 nm
λ*V2: 532.4 nm
#f68f7d
L: 70.09
a: 37.27
b: 26.45
λ*ext: 574 nm
λ*V2: 536 nm
#fd8b78
L: 70.1
a: 41.21
b: 29.2
λ*ext: 572 nm
λ*V2: 537.6 nm
#ff8773
L: 70.12
a: 45.15
b: 31.98
λ*ext: 570 nm
λ*V2: 539.5 nm
#ff836f
L: 70.13
a: 49.1
b: 34.71
λ*ext: 567 nm
λ*V2: 543.1 nm
#ff7f6a
L: 70.14
a: 53.06
b: 37.46
λ*ext: 564 nm
λ*V2: 546.3 nm
#ff7a66
L: 70.16
a: 57.07
b: 40.01
λ*ext: 562 nm
λ*V2: 548 nm
#d1b1ab
L: 75.02
a: 10.34
b: 7.53
λ*ext: 563 nm
λ*V2: 546.8 nm
#d9afa6
L: 75.03
a: 14.19
b: 10.27
λ*ext: 560 nm
λ*V2: 549.9 nm
#e1aca1
L: 75.04
a: 18.06
b: 13.03
λ*ext: 559 nm
λ*V2: 550.7 nm
#e9a99c
L: 75.04
a: 21.96
b: 15.77
λ*ext: 558 nm
λ*V2: 551.8 nm
#f1a698
L: 75.06
a: 25.86
b: 18.49
λ*ext: 556 nm
λ*V2: 554.3 nm
#f8a393
L: 75.07
a: 29.78
b: 21.21
λ*ext: 553 nm
λ*V2: 557.2 nm
#ff9f8e
L: 75.08
a: 33.67
b: 24.02
λ*ext: 552 nm
λ*V2: 557.5 nm
#ff9c89
L: 75.09
a: 37.61
b: 26.71
λ*ext: 548 nm
λ*V2: 561.4 nm
#ff9885
L: 75.1
a: 41.55
b: 29.46
λ*ext: 547 nm
λ*V2: 562.7 nm
#ff9480
L: 75.11
a: 45.48
b: 32.23
λ*ext: 545 nm
λ*V2: 565.1 nm
#e0bfb8
L: 80.01
a: 10.72
b: 7.76
λ*ext: 535 nm
λ*V2: 575.2 nm
#e8bcb3
L: 80.03
a: 14.56
b: 10.51
λ*ext: 533 nm
λ*V2: 577.4 nm
#f1b9ae
L: 80.04
a: 18.44
b: 13.26
λ*ext: 531 nm
λ*V2: 579.3 nm
#f8b6a9
L: 80.05
a: 22.35
b: 15.93
λ*ext: 527 nm
λ*V2: 583.4 nm
#ffb3a4
L: 80.05
a: 26.22
b: 18.74
λ*ext: 527 nm
λ*V2: 582.8 nm
#ffb0a0
L: 80.06
a: 30.13
b: 21.47
λ*ext: 525 nm
λ*V2: 585.2 nm
#ffad9b
L: 80.07
a: 34.03
b: 24.24
λ*ext: 523 nm
λ*V2: 586.9 nm
#efccc5
L: 85.02
a: 11.1
b: 7.97
λ*ext: 504 nm
λ*V2: 606.6 nm
#f8cac0
L: 85.03
a: 14.94
b: 10.75
λ*ext: 501 nm
λ*V2: 609.2 nm
#ffc7bb
L: 85.04
a: 18.8
b: 13.5
λ*ext: 499 nm
λ*V2: 610.7 nm
#ffc4b6
L: 85.04
a: 22.69
b: 16.23
λ*ext: 497 nm
λ*V2: 613 nm
#ffc1b1
L: 85.05
a: 26.57
b: 19
λ*ext: 498 nm
λ*V2: 612.2 nm
#fedad3
L: 90.02
a: 11.46
b: 8.21
λ*ext: 469 nm
λ*V2: 641.7 nm
#ffd7ce
L: 90.03
a: 15.33
b: 10.94
λ*ext: 466 nm
λ*V2: 644 nm
#1a0d09
L: 5.01
a: 4.81
b: 3.64
λ*ext: 727 nm
λ*V2: 382.2 nm
#241815
L: 10.01
a: 5.44
b: 4.42
λ*ext: 725 nm
λ*V2: 384.6 nm
#291611
L: 10.02
a: 9.02
b: 7.39
λ*ext: 725 nm
λ*V2: 384.4 nm
#2e140c
L: 10.03
a: 12.7
b: 10.27
λ*ext: 725 nm
λ*V2: 384.9 nm
#30221f
L: 15.01
a: 5.76
b: 4.78
λ*ext: 722 nm
λ*V2: 387.4 nm
#35201b
L: 15.03
a: 9.39
b: 7.85
λ*ext: 722 nm
λ*V2: 387.7 nm
#3a1e16
L: 15.03
a: 13.06
b: 10.93
λ*ext: 722 nm
λ*V2: 387.8 nm
#3f1b12
L: 15.04
a: 16.72
b: 13.98
λ*ext: 721 nm
λ*V2: 388.4 nm
#44180d
L: 15.06
a: 20.41
b: 16.86
λ*ext: 721 nm
λ*V2: 388.6 nm
#481407
L: 15.06
a: 24.12
b: 19.84
λ*ext: 720 nm
λ*V2: 389.6 nm
#3b2d29
L: 20.02
a: 6.08
b: 5.1
λ*ext: 718 nm
λ*V2: 391.3 nm
#412a24
L: 20.02
a: 9.71
b: 8.17
λ*ext: 718 nm
λ*V2: 391.7 nm
#472820
L: 20.03
a: 13.35
b: 11.21
λ*ext: 717 nm
λ*V2: 392.2 nm
#4c251c
L: 20.04
a: 17.03
b: 14.29
λ*ext: 716 nm
λ*V2: 393.2 nm
#512217
L: 20.05
a: 20.72
b: 17.39
λ*ext: 717 nm
λ*V2: 392.5 nm
#551f13
L: 20.07
a: 24.42
b: 20.51
λ*ext: 716 nm
λ*V2: 393.5 nm
#5a1b0e
L: 20.08
a: 28.15
b: 23.49
λ*ext: 716 nm
λ*V2: 394 nm
#5e1608
L: 20.09
a: 31.87
b: 26.56
λ*ext: 714 nm
λ*V2: 396 nm
#473733
L: 25.01
a: 6.42
b: 5.38
λ*ext: 713 nm
λ*V2: 396.5 nm
#4e352f
L: 25.03
a: 10.03
b: 8.49
λ*ext: 712 nm
λ*V2: 397.2 nm
#53332a
L: 25.03
a: 13.68
b: 11.54
λ*ext: 712 nm
λ*V2: 397.1 nm
#593026
L: 25.03
a: 17.35
b: 14.64
λ*ext: 712 nm
λ*V2: 397.3 nm
#5e2d21
L: 25.05
a: 21.03
b: 17.67
λ*ext: 711 nm
λ*V2: 398.6 nm
#632a1d
L: 25.07
a: 24.73
b: 20.76
λ*ext: 711 nm
λ*V2: 399 nm
#682618
L: 25.08
a: 28.43
b: 23.83
λ*ext: 710 nm
λ*V2: 399.8 nm
#6c2214
L: 25.09
a: 32.18
b: 26.88
λ*ext: 709 nm
λ*V2: 400.8 nm
#711d0f
L: 25.1
a: 35.91
b: 30.07
λ*ext: 707 nm
λ*V2: 402.4 nm
#751709
L: 25.11
a: 39.66
b: 33.06
λ*ext: 705 nm
λ*V2: 404.5 nm
#54423e
L: 30.02
a: 6.77
b: 5.67
λ*ext: 706 nm
λ*V2: 403.1 nm
#5a4039
L: 30.02
a: 10.37
b: 8.76
λ*ext: 706 nm
λ*V2: 403.5 nm
#603e34
L: 30.03
a: 14.01
b: 11.85
λ*ext: 706 nm
λ*V2: 403.7 nm
#663b30
L: 30.03
a: 17.67
b: 14.9
λ*ext: 705 nm
λ*V2: 404.3 nm
#6b382b
L: 30.05
a: 21.35
b: 17.93
λ*ext: 704 nm
λ*V2: 405.3 nm
#713527
L: 30.07
a: 25.03
b: 21.07
λ*ext: 704 nm
λ*V2: 405.6 nm
#763222
L: 30.08
a: 28.73
b: 24.15
λ*ext: 703 nm
λ*V2: 406.7 nm
#7b2e1d
L: 30.09
a: 32.46
b: 27.2
λ*ext: 702 nm
λ*V2: 407.4 nm
#7f2919
L: 30.11
a: 36.19
b: 30.21
λ*ext: 700 nm
λ*V2: 409.2 nm
#842414
L: 30.12
a: 39.93
b: 33.37
λ*ext: 699 nm
λ*V2: 411.1 nm
#881e0e
L: 30.12
a: 43.69
b: 36.44
λ*ext: 697 nm
λ*V2: 412.9 nm
#8d1608
L: 30.13
a: 47.45
b: 39.55
λ*ext: 694 nm
λ*V2: 415.5 nm
#910a02
L: 30.14
a: 51.23
b: 42.43
λ*ext: 690 nm
λ*V2: 419.6 nm
#614e49
L: 35.02
a: 7.13
b: 5.89
λ*ext: 697 nm
λ*V2: 412.3 nm
#674b44
L: 35.02
a: 10.71
b: 9.05
λ*ext: 698 nm
λ*V2: 411.5 nm
#6e493f
L: 35.03
a: 14.35
b: 12.1
λ*ext: 697 nm
λ*V2: 412.4 nm
#74463b
L: 35.04
a: 17.99
b: 15.2
λ*ext: 697 nm
λ*V2: 412.4 nm
