#12377E#12377E

#12377E is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.8% C 0.128 H 261.7°. Best body text is #FFFFFF at 11.21:1 contrast (WCAG AA passes).

Color values

HEX	#12377E
RGB	rgb(18, 55, 126)
HSL	hsl(219, 75%, 28%)
HSV	hsv(219, 86%, 49%)
CMYK	cmyk(85.7%, 56.3%, 0%, 50.6%)
CIE-LAB	lab(24.85, 15.91, -43.82)
CIE-LCH	lch(24.85, 46.61, 289.96°)
OKLab	oklab(35.76% -0.0184 -0.1265)
OKLCH	oklch(35.76% 0.128 261.7)
XYZ	xyz(5.3802, 4.3667, 20.2939)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12377E #7E5912

analogous

#126D7E #12377E #23127E

triadic

#12377E #7E1237 #377E12

tetradic

#12377E #7E126D #7E5912 #127E23

square

#12377E #7E126D #7E5912 #127E23

split-complementary

#12377E #7E2312 #6D7E12

monochromatic

#040C1B #0A2048 #12377E #1A4EB4 #2A68E1

Accessibility & contrast

On white

11.21

#12377E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#12377E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12377E

11.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12377E	#FFFFFF	#000000	##FFFFFF
##12377E	1.00	11.21	1.87	11.21
#FFFFFF	11.21	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004080

Deuteranopia (green-blind)

#00367D

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #12377e;
/* rgb */ color: rgb(18, 55, 126);
/* oklch */ color: oklch(35.8% 0.128 261.7);

Tailwind

colors: {
  custom: {
    50: '#656da4',
    500: '#12377e',
    950: '#000000',
  },
}

SCSS

$custom: #12377e;
$custom-light: #656da4;
$custom-dark: #000000;

JSON

{
  "hex": "#12377e",
  "rgb": {
    "r": 18,
    "g": 55,
    "b": 126
  },
  "hsl": {
    "h": 219.444,
    "s": 75,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35764,
    "c": 0.12779,
    "h": 261.7
  },
  "luminance": 0.04367
}

Semantic roles & 50–950 ramp

primary

#12377E

secondary

#B48938

accent

#B136F2

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #12377E

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

Preview Lab → · Contrast checker → · Palette generator →