#1C377F#1C377F

#1C377F is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.126 H 265.1°. Best body text is #FFFFFF at 11.04:1 contrast (WCAG AA passes).

Color values

HEX	#1C377F
RGB	rgb(28, 55, 127)
HSL	hsl(224, 64%, 30%)
HSV	hsv(224, 78%, 50%)
CMYK	cmyk(78%, 56.7%, 0%, 50.2%)
CIE-LAB	lab(25.29, 17.43, -43.71)
CIE-LCH	lch(25.29, 47.05, 291.74°)
OKLab	oklab(36.23% -0.0109 -0.126)
OKLCH	oklch(36.23% 0.126 265.1)
XYZ	xyz(5.6745, 4.5109, 20.6462)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C377F #7F641C

analogous

#1C697F #1C377F #321C7F

triadic

#1C377F #7F1C37 #377F1C

tetradic

#1C377F #7F1C69 #7F641C #1C7F32

square

#1C377F #7F1C69 #7F641C #1C7F32

split-complementary

#1C377F #7F321C #697F1C

monochromatic

#060C1B #11214D #1C377F #274DB1 #4069D5

Accessibility & contrast

On white

11.04

#1C377F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1C377F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C377F

11.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C377F	#FFFFFF	#000000	##FFFFFF
##1C377F	1.00	11.04	1.90	11.04
#FFFFFF	11.04	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004182

Deuteranopia (green-blind)

#00387E

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1c377f;
/* rgb */ color: rgb(28, 55, 127);
/* oklch */ color: oklch(36.2% 0.126 265.1);

Tailwind

colors: {
  custom: {
    50: '#686da5',
    500: '#1c377f',
    950: '#000000',
  },
}

SCSS

$custom: #1c377f;
$custom-light: #686da5;
$custom-dark: #000000;

JSON

{
  "hex": "#1c377f",
  "rgb": {
    "r": 28,
    "g": 55,
    "b": 127
  },
  "hsl": {
    "h": 223.636,
    "s": 63.871,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36228,
    "c": 0.12645,
    "h": 265.1
  },
  "luminance": 0.04512
}

Semantic roles & 50–950 ramp

primary

#1C377F

secondary

#B39444

accent

#BA41E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1C377F

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

Preview Lab → · Contrast checker → · Palette generator →