#123F81#123F81

#123F81 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 37.8% C 0.122 H 258.7°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#123F81
RGB	rgb(18, 63, 129)
HSL	hsl(216, 76%, 29%)
HSV	hsv(216, 86%, 51%)
CMYK	cmyk(86%, 51.2%, 0%, 49.4%)
CIE-LAB	lab(27.48, 11.52, -41.43)
CIE-LCH	lch(27.48, 43.00, 285.54°)
OKLab	oklab(37.85% -0.0239 -0.1193)
OKLCH	oklch(37.85% 0.122 258.7)
XYZ	xyz(5.9880, 5.2678, 21.4658)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F81 #815412

analogous

#127781 #123F81 #1D1281

triadic

#123F81 #81123F #3F8112

tetradic

#123F81 #811277 #815412 #12811D

square

#123F81 #811277 #815412 #12811D

split-complementary

#123F81 #811D12 #778112

monochromatic

#040D1B #0B254B #123F81 #1959B7 #2C76E2

Accessibility & contrast

On white

10.22

#123F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#123F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F81

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F81	#FFFFFF	#000000	##FFFFFF
##123F81	1.00	10.22	2.05	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164683

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #123f81;
/* rgb */ color: rgb(18, 63, 129);
/* oklch */ color: oklch(37.8% 0.122 258.7);

Tailwind

colors: {
  custom: {
    50: '#6573a6',
    500: '#123f81',
    950: '#000000',
  },
}

SCSS

$custom: #123f81;
$custom-light: #6573a6;
$custom-dark: #000000;

JSON

{
  "hex": "#123f81",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 129
  },
  "hsl": {
    "h": 215.676,
    "s": 75.51,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37848,
    "c": 0.12164,
    "h": 258.7
  },
  "luminance": 0.05269
}

Semantic roles & 50–950 ramp

primary

#123F81

secondary

#B78338

accent

#A636F2

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #123F81

Body copy rendered with the generated semantic roles for this colour.

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