#12377F#12377F

#12377F is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.129 H 261.9°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#12377F
RGB	rgb(18, 55, 127)
HSL	hsl(220, 75%, 28%)
HSV	hsv(220, 86%, 50%)
CMYK	cmyk(85.8%, 56.7%, 0%, 50.2%)
CIE-LAB	lab(24.93, 16.33, -44.31)
CIE-LCH	lch(24.93, 47.23, 290.23°)
OKLab	oklab(35.85% -0.0183 -0.1279)
OKLCH	oklch(35.85% 0.129 261.9)
XYZ	xyz(5.4450, 4.3926, 20.6354)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12377F #7F5A12

analogous

#126D7F #12377F #23127F

triadic

#12377F #7F1237 #377F12

tetradic

#12377F #7F126D #7F5A12 #127F23

square

#12377F #7F126D #7F5A12 #127F23

split-complementary

#12377F #7F2312 #6D7F12

monochromatic

#040C1B #0A2049 #12377F #1A4EB5 #2B68E1

Accessibility & contrast

On white

11.18

#12377F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#12377F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12377F

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12377F	#FFFFFF	#000000	##FFFFFF
##12377F	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004082

Deuteranopia (green-blind)

#00367E

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #12377f;
/* rgb */ color: rgb(18, 55, 127);
/* oklch */ color: oklch(35.9% 0.129 261.9);

Tailwind

colors: {
  custom: {
    50: '#656da5',
    500: '#12377f',
    950: '#000000',
  },
}

SCSS

$custom: #12377f;
$custom-light: #656da5;
$custom-dark: #000000;

JSON

{
  "hex": "#12377f",
  "rgb": {
    "r": 18,
    "g": 55,
    "b": 127
  },
  "hsl": {
    "h": 219.633,
    "s": 75.172,
    "l": 28.431
  },
  "oklch": {
    "l": 0.3585,
    "c": 0.12923,
    "h": 261.9
  },
  "luminance": 0.04393
}

Semantic roles & 50–950 ramp

primary

#12377F

secondary

#B58A38

accent

#B236F2

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #12377F

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

Preview Lab → · Contrast checker → · Palette generator →