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.


H010_L060_C015
#b68386
L: 60.06
a: 19.78
b: 6.51
λ*ext: 623 nm
λ*V2: 486.6 nm
H010_L060_C020
#be8085
L: 60.08
a: 24.6
b: 7.28
λ*ext: 620 nm
λ*V2: 490.1 nm
H010_L060_C025
#c57c83
L: 60.1
a: 29.44
b: 8.04
λ*ext: 617 nm
λ*V2: 493.1 nm
H010_L060_C030
#cd7882
L: 60.11
a: 34.27
b: 8.79
λ*ext: 614 nm
λ*V2: 495.8 nm
H010_L060_C035
#d47481
L: 60.13
a: 39.11
b: 9.56
λ*ext: 611 nm
λ*V2: 499.4 nm
H010_L060_C040
#db6f80
L: 60.15
a: 43.96
b: 10.27
λ*ext: 607 nm
λ*V2: 503.5 nm
H010_L060_C045
#e26a7f
L: 60.17
a: 48.79
b: 11.04
λ*ext: 603 nm
λ*V2: 507.1 nm
H010_L060_C050
#e9657e
L: 60.19
a: 53.63
b: 11.83
λ*ext: 599 nm
λ*V2: 510.9 nm
H010_L060_C055
#f05f7d
L: 60.21
a: 58.48
b: 12.54
λ*ext: 594 nm
λ*V2: 515.9 nm
H010_L060_C060
#f7587c
L: 60.22
a: 63.34
b: 13.25
λ*ext: 588 nm
λ*V2: 521.9 nm
H010_L060_C065
#fe507c
L: 60.23
a: 68.21
b: 13.92
λ*ext: 582 nm
λ*V2: 527.8 nm
H010_L060_C070
#ff477b
L: 60.25
a: 73.07
b: 14.64
λ*ext: 577 nm
λ*V2: 532.9 nm
H010_L065_C005
#b49795
L: 65.02
a: 10.53
b: 5.15
λ*ext: 609 nm
λ*V2: 500.4 nm
H010_L065_C010
#bc9393
L: 65.04
a: 15.34
b: 5.95
λ*ext: 606 nm
λ*V2: 503.8 nm
H010_L065_C015
#c59092
L: 65.06
a: 20.15
b: 6.74
λ*ext: 602 nm
λ*V2: 507.8 nm
H010_L065_C020
#cd8d91
L: 65.08
a: 24.96
b: 7.53
λ*ext: 599 nm
λ*V2: 510.8 nm
H010_L065_C025
#d58990
L: 65.1
a: 29.8
b: 8.28
λ*ext: 595 nm
λ*V2: 514.6 nm
H010_L065_C030
#dc858f
L: 65.11
a: 34.64
b: 9.03
λ*ext: 592 nm
λ*V2: 517.8 nm
H010_L065_C035
#e4818e
L: 65.13
a: 39.48
b: 9.79
λ*ext: 588 nm
λ*V2: 522 nm
H010_L065_C040
#eb7c8d
L: 65.15
a: 44.31
b: 10.55
λ*ext: 584 nm
λ*V2: 526 nm
H010_L065_C045
#f2778c
L: 65.17
a: 49.15
b: 11.3
λ*ext: 580 nm
λ*V2: 530.3 nm
H010_L065_C050
#f9728b
L: 65.19
a: 54
b: 12.02
λ*ext: 574 nm
λ*V2: 535.8 nm
H010_L065_C055
#ff6c8a
L: 65.2
a: 58.84
b: 12.77
λ*ext: 568 nm
λ*V2: 541.3 nm
H010_L065_C060
#ff6689
L: 65.22
a: 63.69
b: 13.5
λ*ext: 563 nm
λ*V2: 547.1 nm
H010_L070_C005
#c2a4a1
L: 70.02
a: 10.91
b: 5.37
λ*ext: 587 nm
λ*V2: 522.8 nm
H010_L070_C010
#cba0a0
L: 70.04
a: 15.74
b: 6.12
λ*ext: 582 nm
λ*V2: 527.8 nm
H010_L070_C015
#d49d9f
L: 70.06
a: 20.53
b: 6.95
λ*ext: 579 nm
λ*V2: 530.9 nm
H010_L070_C020
#dc9a9e
L: 70.08
a: 25.36
b: 7.71
λ*ext: 574 nm
λ*V2: 535.7 nm
H010_L070_C025
#e4969d
L: 70.1
a: 30.18
b: 8.5
λ*ext: 572 nm
λ*V2: 538.2 nm
H010_L070_C030
#ec929c
L: 70.11
a: 35.02
b: 9.23
λ*ext: 567 nm
λ*V2: 542.5 nm
H010_L070_C035
#f38e9b
L: 70.13
a: 39.86
b: 9.99
λ*ext: 562 nm
λ*V2: 547.7 nm
H010_L070_C040
#fb899a
L: 70.15
a: 44.7
b: 10.73
λ*ext: 557 nm
λ*V2: 552.6 nm
H010_L070_C045
#ff8498
L: 70.17
a: 49.51
b: 11.56
λ*ext: 554 nm
λ*V2: 555.7 nm
H010_L070_C050
#ff7f97
L: 70.19
a: 54.36
b: 12.28
λ*ext: 547 nm
λ*V2: 563.2 nm
H010_L075_C005
#d1b1ae
L: 75.02
a: 11.31
b: 5.56
λ*ext: 561 nm
λ*V2: 549 nm
H010_L075_C010
#daaead
L: 75.04
a: 16.1
b: 6.38
λ*ext: 557 nm
λ*V2: 552.6 nm
H010_L075_C015
#e3aaac
L: 75.06
a: 20.92
b: 7.15
λ*ext: 553 nm
λ*V2: 556.8 nm
H010_L075_C020
#eba7ab
L: 75.08
a: 25.73
b: 7.94
λ*ext: 548 nm
λ*V2: 561.7 nm
H010_L075_C025
#f3a3aa
L: 75.09
a: 30.57
b: 8.7
λ*ext: 544 nm
λ*V2: 565.7 nm
H010_L075_C030
#fb9fa9
L: 75.11
a: 35.4
b: 9.46
λ*ext: 540 nm
λ*V2: 569.5 nm
H010_L075_C035
#ff9ba8
L: 75.13
a: 40.25
b: 10.17
λ*ext: 534 nm
λ*V2: 575.9 nm
H010_L075_C040
#ff96a6
L: 75.15
a: 45.06
b: 10.98
λ*ext: 530 nm
λ*V2: 579.9 nm
H010_L080_C005
#e0bebc
L: 80.02
a: 11.7
b: 5.76
λ*ext: 532 nm
λ*V2: 577.8 nm
H010_L080_C010
#e9bbba
L: 80.04
a: 16.48
b: 6.59
λ*ext: 529 nm
λ*V2: 581.5 nm
H010_L080_C015
#f2b8b9
L: 80.06
a: 21.32
b: 7.33
λ*ext: 522 nm
λ*V2: 587.6 nm
H010_L080_C020
#fab4b8
L: 80.08
a: 26.13
b: 8.12
λ*ext: 517 nm
λ*V2: 592.8 nm
H010_L080_C025
#ffb0b7
L: 80.09
a: 30.95
b: 8.9
λ*ext: 514 nm
λ*V2: 596.3 nm
H010_L080_C030
#ffacb6
L: 80.11
a: 35.78
b: 9.68
λ*ext: 510 nm
λ*V2: 599.7 nm
H010_L085_C005
#efccc9
L: 85.02
a: 12.06
b: 6.02
λ*ext: 502 nm
λ*V2: 608.3 nm
H010_L085_C010
#f8c8c8
L: 85.04
a: 16.89
b: 6.76
λ*ext: 495 nm
λ*V2: 615.5 nm
H010_L085_C015
#ffc5c7
L: 85.06
a: 21.69
b: 7.56
λ*ext: 491 nm
λ*V2: 619.5 nm
H010_L085_C020
#ffc1c5
L: 85.07
a: 26.49
b: 8.39
λ*ext: 487 nm
λ*V2: 623.1 nm
H010_L090_C005
#ffdad7
L: 90.02
a: 12.44
b: 6.23
λ*ext: 465 nm
λ*V2: 645.3 nm
H010_L090_C010
#ffd6d5
L: 90.04
a: 17.25
b: 7.01
λ*ext: 461 nm
λ*V2: 649.2 nm
H015_L005_C005
#1a0d0d
L: 5.01
a: 5.99
b: 1.84
λ*ext: 727 nm
λ*V2: 382.4 nm
H015_L010_C005
#251818
L: 10.03
a: 6.49
b: 2.65
λ*ext: 725 nm
λ*V2: 384.7 nm
H015_L010_C010
#2b1516
L: 10.04
a: 11.23
b: 3.82
λ*ext: 724 nm
λ*V2: 385.2 nm
H015_L010_C015
#301215
L: 10.05
a: 15.98
b: 4.89
λ*ext: 724 nm
λ*V2: 385.7 nm
H015_L010_C020
#350d14
L: 10.05
a: 20.8
b: 5.89
λ*ext: 723 nm
λ*V2: 386.3 nm
H015_L015_C005
#302221
L: 15.02
a: 6.86
b: 2.93
λ*ext: 722 nm
λ*V2: 387.7 nm
H015_L015_C010
#361f20
L: 15.03
a: 11.55
b: 4.13
λ*ext: 721 nm
λ*V2: 388.1 nm
H015_L015_C015
#3c1c1e
L: 15.06
a: 16.27
b: 5.3
λ*ext: 721 nm
λ*V2: 389 nm
H015_L015_C020
#42181d
L: 15.08
a: 21
b: 6.48
λ*ext: 720 nm
λ*V2: 389.6 nm
H015_L015_C025
#47131c
L: 15.09
a: 25.76
b: 7.6
λ*ext: 719 nm
λ*V2: 390.6 nm
H015_L015_C030
#4c0c1b
L: 15.08
a: 30.62
b: 8.52
λ*ext: 717 nm
λ*V2: 392.2 nm
H015_L020_C005
#3c2c2b
L: 20.02
a: 7.2
b: 3.22
λ*ext: 718 nm
λ*V2: 391.6 nm
H015_L020_C010
#42292a
L: 20.04
a: 11.9
b: 4.42
λ*ext: 717 nm
λ*V2: 392.6 nm
H015_L020_C015
#492628
L: 20.05
a: 16.6
b: 5.64
λ*ext: 716 nm
λ*V2: 393.2 nm
H015_L020_C020
#4f2227
L: 20.07
a: 21.33
b: 6.82
λ*ext: 716 nm
λ*V2: 393.9 nm
H015_L020_C025
#541e25
L: 20.09
a: 26.08
b: 7.96
λ*ext: 715 nm
λ*V2: 395.1 nm
H015_L020_C030
#5a1824
L: 20.1
a: 30.84
b: 9.07
λ*ext: 713 nm
λ*V2: 397 nm
H015_L020_C035
#5f1123
L: 20.11
a: 35.65
b: 10.08
λ*ext: 711 nm
λ*V2: 398.3 nm
H015_L020_C040
#650522
L: 20.12
a: 40.43
b: 11.08
λ*ext: 710 nm
λ*V2: 399.9 nm
H015_L025_C005
#483736
L: 25.02
a: 7.55
b: 3.49
λ*ext: 712 nm
λ*V2: 397.2 nm
H015_L025_C010
#4f3434
L: 25.04
a: 12.24
b: 4.71
λ*ext: 712 nm
λ*V2: 397.7 nm
H015_L025_C015
#553133
L: 25.06
a: 16.93
b: 5.92
λ*ext: 711 nm
λ*V2: 398.9 nm
H015_L025_C020
#5c2d31
L: 25.08
a: 21.64
b: 7.16
λ*ext: 710 nm
λ*V2: 399.5 nm
H015_L025_C025
#622930
L: 25.09
a: 26.39
b: 8.32
λ*ext: 709 nm
λ*V2: 400.8 nm
H015_L025_C030
#68242e
L: 25.11
a: 31.14
b: 9.43
λ*ext: 707 nm
λ*V2: 402.3 nm
H015_L025_C035
#6d1e2d
L: 25.13
a: 35.89
b: 10.56
λ*ext: 705 nm
λ*V2: 404.3 nm
H015_L025_C040
#73162c
L: 25.13
a: 40.69
b: 11.61
λ*ext: 703 nm
λ*V2: 406.3 nm
H015_L025_C045
#780a2b
L: 25.13
a: 45.54
b: 12.5
λ*ext: 701 nm
λ*V2: 408.5 nm
H015_L030_C005
#554241
L: 30.02
a: 7.88
b: 3.8
λ*ext: 706 nm
λ*V2: 403.5 nm
H015_L030_C010
#5c3f3f
L: 30.03
a: 12.58
b: 5
λ*ext: 705 nm
λ*V2: 404.6 nm
H015_L030_C015
#633c3d
L: 30.06
a: 17.27
b: 6.23
λ*ext: 704 nm
λ*V2: 406.1 nm
H015_L030_C020
#69383c
L: 30.07
a: 21.99
b: 7.42
λ*ext: 703 nm
λ*V2: 407.1 nm
H015_L030_C025
#6f343a
L: 30.09
a: 26.72
b: 8.59
λ*ext: 701 nm
λ*V2: 408.3 nm
H015_L030_C030
#753039
L: 30.1
a: 31.47
b: 9.75
λ*ext: 700 nm
λ*V2: 409.9 nm
H015_L030_C035
#7b2a37
L: 30.13
a: 36.21
b: 10.88
λ*ext: 697 nm
λ*V2: 412.4 nm
H015_L030_C040
#812436
L: 30.14
a: 40.97
b: 12.04
λ*ext: 696 nm
λ*V2: 413.7 nm
H015_L030_C045
#871c34
L: 30.15
a: 45.73
b: 13.12
λ*ext: 694 nm
λ*V2: 416.2 nm
H015_L030_C050
#8d1034
L: 30.15
a: 50.59
b: 13.96
λ*ext: 690 nm
λ*V2: 419.5 nm
H015_L030_C055
#920032
L: 30.16
a: 55.39
b: 14.92
λ*ext: 687 nm
λ*V2: 422.7 nm
H015_L035_C005
#614d4c
L: 35.02
a: 8.23
b: 4.06
λ*ext: 698 nm
λ*V2: 412 nm
H015_L035_C010
#694a4a
L: 35.04
a: 12.92
b: 5.28
λ*ext: 696 nm
λ*V2: 413.4 nm
H015_L035_C015
#704748
L: 35.06
a: 17.62
b: 6.5
λ*ext: 695 nm
λ*V2: 414.2 nm
H015_L035_C020
#774447
L: 35.08
a: 22.33
b: 7.7
λ*ext: 694 nm
λ*V2: 415.7 nm
H015_L035_C025
#7d4045
L: 35.09
a: 27.07
b: 8.87
λ*ext: 692 nm
λ*V2: 417.3 nm
H015_L035_C030
#843b43
L: 35.11
a: 31.79
b: 10.06
λ*ext: 691 nm
λ*V2: 418.9 nm
H015_L035_C035
#8a3742
L: 35.13
a: 36.54
b: 11.2
λ*ext: 689 nm
λ*V2: 421 nm
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