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.
#897170
L: 50.03
a: 9.52
b: 3.99
λ*ext: 662 nm
λ*V2: 447.9 nm
#916e70
L: 50.04
a: 14.4
b: 4.39
λ*ext: 660 nm
λ*V2: 449.6 nm
#996a6f
L: 50.06
a: 19.3
b: 4.77
λ*ext: 658 nm
λ*V2: 452 nm
#a0676f
L: 50.08
a: 24.2
b: 5.12
λ*ext: 655 nm
λ*V2: 454.8 nm
#a8636f
L: 50.11
a: 29.11
b: 5.47
λ*ext: 652 nm
λ*V2: 457.7 nm
#af5f6e
L: 50.13
a: 34.03
b: 5.79
λ*ext: 649 nm
λ*V2: 460.5 nm
#b65a6e
L: 50.14
a: 38.95
b: 6.11
λ*ext: 646 nm
λ*V2: 463.4 nm
#bc556e
L: 50.16
a: 43.87
b: 6.45
λ*ext: 643 nm
λ*V2: 466.5 nm
#c3506e
L: 50.18
a: 48.81
b: 6.73
λ*ext: 639 nm
λ*V2: 470.9 nm
#ca496d
L: 50.2
a: 53.74
b: 7.01
λ*ext: 636 nm
λ*V2: 474.1 nm
#d0426d
L: 50.21
a: 58.68
b: 7.32
λ*ext: 631 nm
λ*V2: 478.7 nm
#d73a6d
L: 50.23
a: 63.63
b: 7.52
λ*ext: 626 nm
λ*V2: 483.8 nm
#dd2f6d
L: 50.24
a: 68.61
b: 7.7
λ*ext: 621 nm
λ*V2: 489.4 nm
#e3206d
L: 50.24
a: 73.61
b: 7.84
λ*ext: 615 nm
λ*V2: 495.4 nm
#e9006d
L: 50.25
a: 78.65
b: 7.84
λ*ext: 606 nm
λ*V2: 503.6 nm
#f0006e
L: 50.25
a: 83.69
b: 7.84
λ*ext: 600 nm
λ*V2: 510.2 nm
#977d7c
L: 55.03
a: 9.88
b: 4.23
λ*ext: 646 nm
λ*V2: 463.7 nm
#9f7a7c
L: 55.04
a: 14.78
b: 4.62
λ*ext: 644 nm
λ*V2: 465.5 nm
#a7777b
L: 55.06
a: 19.67
b: 4.99
λ*ext: 641 nm
λ*V2: 469.2 nm
#af737b
L: 55.08
a: 24.56
b: 5.37
λ*ext: 638 nm
λ*V2: 471.6 nm
#b66f7b
L: 55.11
a: 29.48
b: 5.69
λ*ext: 635 nm
λ*V2: 474.9 nm
#bd6b7a
L: 55.12
a: 34.4
b: 6.03
λ*ext: 632 nm
λ*V2: 477.9 nm
#c5677a
L: 55.14
a: 39.32
b: 6.35
λ*ext: 629 nm
λ*V2: 481.4 nm
#cc627a
L: 55.16
a: 44.23
b: 6.69
λ*ext: 625 nm
λ*V2: 484.7 nm
#d25d7a
L: 55.18
a: 49.17
b: 6.96
λ*ext: 621 nm
λ*V2: 489.3 nm
#d95779
L: 55.2
a: 54.1
b: 7.26
λ*ext: 617 nm
λ*V2: 493.2 nm
#e05079
L: 55.22
a: 59.02
b: 7.59
λ*ext: 612 nm
λ*V2: 497.7 nm
#e74979
L: 55.23
a: 63.99
b: 7.78
λ*ext: 606 nm
λ*V2: 504.3 nm
#ed4079
L: 55.25
a: 68.91
b: 8.1
λ*ext: 601 nm
λ*V2: 508.7 nm
#f33579
L: 55.25
a: 73.88
b: 8.3
λ*ext: 594 nm
λ*V2: 515.6 nm
#fa2679
L: 55.26
a: 78.87
b: 8.46
λ*ext: 588 nm
λ*V2: 522.2 nm
#a58a89
L: 60.03
a: 10.26
b: 4.47
λ*ext: 628 nm
λ*V2: 481.7 nm
#ae8788
L: 60.04
a: 15.14
b: 4.88
λ*ext: 626 nm
λ*V2: 483.8 nm
#b68388
L: 60.06
a: 20.04
b: 5.24
λ*ext: 623 nm
λ*V2: 487.2 nm
#bd8087
L: 60.08
a: 24.94
b: 5.59
λ*ext: 619 nm
λ*V2: 491.1 nm
#c57c87
L: 60.1
a: 29.87
b: 5.89
λ*ext: 615 nm
λ*V2: 495.1 nm
#cd7887
L: 60.12
a: 34.77
b: 6.25
λ*ext: 612 nm
λ*V2: 497.9 nm
#d47387
L: 60.14
a: 39.69
b: 6.59
λ*ext: 608 nm
λ*V2: 501.9 nm
#db6f86
L: 60.16
a: 44.6
b: 6.92
λ*ext: 604 nm
λ*V2: 505.7 nm
#e26a86
L: 60.18
a: 49.52
b: 7.26
λ*ext: 600 nm
λ*V2: 509.8 nm
#e96486
L: 60.2
a: 54.45
b: 7.54
λ*ext: 596 nm
λ*V2: 514.3 nm
#f05e86
L: 60.22
a: 59.39
b: 7.81
λ*ext: 591 nm
λ*V2: 519.3 nm
#f75785
L: 60.23
a: 64.33
b: 8.09
λ*ext: 584 nm
λ*V2: 525.8 nm
#fd4f85
L: 60.25
a: 69.25
b: 8.41
λ*ext: 577 nm
λ*V2: 532.7 nm
#ff4685
L: 60.26
a: 74.17
b: 8.7
λ*ext: 574 nm
λ*V2: 536.1 nm
#b49795
L: 65.02
a: 10.62
b: 4.72
λ*ext: 609 nm
λ*V2: 501.1 nm
#bc9395
L: 65.04
a: 15.53
b: 5.06
λ*ext: 605 nm
λ*V2: 505 nm
#c49094
L: 65.07
a: 20.42
b: 5.45
λ*ext: 601 nm
λ*V2: 508.8 nm
#cc8c94
L: 65.09
a: 25.31
b: 5.83
λ*ext: 598 nm
λ*V2: 512.2 nm
#d48994
L: 65.1
a: 30.22
b: 6.16
λ*ext: 594 nm
λ*V2: 516.2 nm
#dc8593
L: 65.12
a: 35.15
b: 6.48
λ*ext: 590 nm
λ*V2: 520.1 nm
#e38093
L: 65.14
a: 40.05
b: 6.82
λ*ext: 586 nm
λ*V2: 524.3 nm
#eb7c93
L: 65.16
a: 44.97
b: 7.17
λ*ext: 581 nm
λ*V2: 529 nm
#f27792
L: 65.18
a: 49.88
b: 7.5
λ*ext: 577 nm
λ*V2: 533.4 nm
#f97192
L: 65.2
a: 54.8
b: 7.84
λ*ext: 572 nm
λ*V2: 537.9 nm
#ff6b92
L: 65.21
a: 59.73
b: 8.14
λ*ext: 566 nm
λ*V2: 544.2 nm
#ff6592
L: 65.23
a: 64.66
b: 8.41
λ*ext: 560 nm
λ*V2: 550 nm
#c2a4a2
L: 70.02
a: 11.01
b: 4.93
λ*ext: 587 nm
λ*V2: 523.2 nm
#cba0a2
L: 70.05
a: 15.91
b: 5.28
λ*ext: 581 nm
λ*V2: 528.5 nm
#d39da1
L: 70.06
a: 20.79
b: 5.67
λ*ext: 578 nm
λ*V2: 532.2 nm
#db99a1
L: 70.08
a: 25.7
b: 6.03
λ*ext: 574 nm
λ*V2: 536 nm
#e396a1
L: 70.1
a: 30.59
b: 6.4
λ*ext: 570 nm
λ*V2: 540.2 nm
#eb92a0
L: 70.12
a: 35.52
b: 6.7
λ*ext: 565 nm
λ*V2: 545.1 nm
#f38da0
L: 70.14
a: 40.43
b: 7.05
λ*ext: 561 nm
λ*V2: 549.2 nm
#fa89a0
L: 70.16
a: 45.33
b: 7.42
λ*ext: 555 nm
λ*V2: 554.6 nm
#ff849f
L: 70.18
a: 50.25
b: 7.74
λ*ext: 550 nm
λ*V2: 560.1 nm
#ff7f9f
L: 70.19
a: 55.18
b: 8.03
λ*ext: 543 nm
λ*V2: 566.3 nm
#d1b1af
L: 75.02
a: 11.4
b: 5.12
λ*ext: 560 nm
λ*V2: 549.6 nm
#daaeaf
L: 75.04
a: 16.29
b: 5.5
λ*ext: 555 nm
λ*V2: 554.8 nm
#e2aaae
L: 75.07
a: 21.19
b: 5.85
λ*ext: 550 nm
λ*V2: 559.7 nm
#eba7ae
L: 75.08
a: 26.08
b: 6.24
λ*ext: 547 nm
λ*V2: 563.1 nm
#f3a3ae
L: 75.1
a: 30.98
b: 6.6
λ*ext: 543 nm
λ*V2: 567.2 nm
#fb9fad
L: 75.12
a: 35.9
b: 6.93
λ*ext: 537 nm
λ*V2: 572.9 nm
#ff9bad
L: 75.14
a: 40.81
b: 7.28
λ*ext: 533 nm
λ*V2: 576.3 nm
#ff96ad
L: 75.16
a: 45.72
b: 7.6
λ*ext: 526 nm
λ*V2: 583.3 nm
#e0bebc
L: 80.02
a: 11.78
b: 5.35
λ*ext: 531 nm
λ*V2: 578.8 nm
#e9bbbc
L: 80.04
a: 16.66
b: 5.74
λ*ext: 528 nm
λ*V2: 582.2 nm
#f2b7bc
L: 80.06
a: 21.57
b: 6.07
λ*ext: 522 nm
λ*V2: 588.4 nm
#fab4bb
L: 80.08
a: 26.46
b: 6.47
λ*ext: 518 nm
λ*V2: 592.2 nm
#ffb0bb
L: 80.1
a: 31.39
b: 6.76
λ*ext: 510 nm
λ*V2: 599.7 nm
#ffacba
L: 80.12
a: 36.28
b: 7.15
λ*ext: 507 nm
λ*V2: 602.6 nm
#efccca
L: 85.02
a: 12.16
b: 5.57
λ*ext: 501 nm
λ*V2: 609.4 nm
#f8c8c9
L: 85.04
a: 17.07
b: 5.9
λ*ext: 493 nm
λ*V2: 617.1 nm
#ffc5c9
L: 85.06
a: 21.95
b: 6.29
λ*ext: 490 nm
λ*V2: 620.5 nm
#ffc1c8
L: 85.08
a: 26.83
b: 6.7
λ*ext: 485 nm
λ*V2: 624.6 nm
#ffd9d7
L: 90.02
a: 12.53
b: 5.81
λ*ext: 466 nm
λ*V2: 644.6 nm
#ffd6d7
L: 90.04
a: 17.41
b: 6.2
λ*ext: 461 nm
λ*V2: 648.8 nm
#1a0d0e
L: 5.02
a: 6.12
b: 1.41
λ*ext: 727 nm
λ*V2: 382.5 nm
#251818
L: 10.02
a: 6.67
b: 2.2
λ*ext: 725 nm
λ*V2: 384.7 nm
#2b1517
L: 10.06
a: 11.45
b: 2.98
λ*ext: 724 nm
λ*V2: 385.4 nm
#301117
L: 10.05
a: 16.32
b: 3.71
λ*ext: 724 nm
λ*V2: 385.7 nm
#350d16
L: 10.05
a: 21.31
b: 4.2
λ*ext: 723 nm
λ*V2: 386.7 nm
#302222
L: 15.02
a: 6.98
b: 2.48
λ*ext: 722 nm
λ*V2: 387.8 nm
#361f21
L: 15.04
a: 11.8
b: 3.36
λ*ext: 721 nm
λ*V2: 388 nm
#3c1b20
L: 15.06
a: 16.62
b: 4.08
λ*ext: 721 nm
λ*V2: 389 nm
#42171f
L: 15.07
a: 21.48
b: 4.84
λ*ext: 720 nm
λ*V2: 389.7 nm
#47121f
L: 15.09
a: 26.34
b: 5.52
λ*ext: 719 nm
λ*V2: 390.8 nm
#4d0b1e
L: 15.08
a: 31.33
b: 5.95
λ*ext: 717 nm
λ*V2: 392.3 nm
#3c2c2c
L: 20.03
a: 7.31
b: 2.79
λ*ext: 718 nm
λ*V2: 391.8 nm
#42292b
L: 20.04
a: 12.13
b: 3.56
λ*ext: 717 nm
λ*V2: 392.9 nm
