#1C377E#1C377E

#1C377E is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.1% C 0.125 H 265.0°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#1C377E
RGB	rgb(28, 55, 126)
HSL	hsl(223, 64%, 30%)
HSV	hsv(223, 78%, 49%)
CMYK	cmyk(77.8%, 56.3%, 0%, 50.6%)
CIE-LAB	lab(25.21, 17.02, -43.21)
CIE-LCH	lch(25.21, 46.44, 291.51°)
OKLab	oklab(36.14% -0.0109 -0.1245)
OKLCH	oklch(36.14% 0.125 265)
XYZ	xyz(5.6096, 4.4850, 20.3047)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C377E #7E631C

analogous

#1C687E #1C377E #321C7E

triadic

#1C377E #7E1C37 #377E1C

tetradic

#1C377E #7E1C68 #7E631C #1C7E32

square

#1C377E #7E1C68 #7E631C #1C7E32

split-complementary

#1C377E #7E321C #687E1C

monochromatic

#060B1A #11214C #1C377E #274DB0 #4069D5

Accessibility & contrast

On white

11.07

#1C377E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1C377E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C377E

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C377E	#FFFFFF	#000000	##FFFFFF
##1C377E	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004180

Deuteranopia (green-blind)

#00377D

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1c377e;
/* rgb */ color: rgb(28, 55, 126);
/* oklch */ color: oklch(36.1% 0.125 265.0);

Tailwind

colors: {
  custom: {
    50: '#686da4',
    500: '#1c377e',
    950: '#000000',
  },
}

SCSS

$custom: #1c377e;
$custom-light: #686da4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c377e",
  "rgb": {
    "r": 28,
    "g": 55,
    "b": 126
  },
  "hsl": {
    "h": 223.469,
    "s": 63.636,
    "l": 30.196
  },
  "oklch": {
    "l": 0.36143,
    "c": 0.12499,
    "h": 265
  },
  "luminance": 0.04486
}

Semantic roles & 50–950 ramp

primary

#1C377E

secondary

#B29344

accent

#B941E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1C377E

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

Preview Lab → · Contrast checker → · Palette generator →