#1C4399#1C4399

#1C4399 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.0% C 0.148 H 263.1°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#1C4399
RGB	rgb(28, 67, 153)
HSL	hsl(221, 69%, 35%)
HSV	hsv(221, 82%, 60%)
CMYK	cmyk(81.7%, 56.2%, 0%, 40%)
CIE-LAB	lab(30.78, 19.58, -50.86)
CIE-LCH	lch(30.78, 54.50, 291.06°)
OKLab	oklab(41.02% -0.0178 -0.1468)
OKLCH	oklch(41.02% 0.148 263.1)
XYZ	xyz(8.2338, 6.5601, 30.9631)
Luminance	0.0656 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4399 #99721C

analogous

#1C8199 #1C4399 #331C99

triadic

#1C4399 #991C43 #43991C

tetradic

#1C4399 #991C81 #99721C #1C9933

square

#1C4399 #991C81 #99721C #1C9933

split-complementary

#1C4399 #99331C #81991C

monochromatic

#091632 #132C65 #1C4399 #255ACD #507DDF

Accessibility & contrast

On white

9.08

#1C4399 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1C4399 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4399

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4399	#FFFFFF	#000000	##FFFFFF
##1C4399	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9C

Deuteranopia (green-blind)

#004397

Tritanopia (blue-blind)

#005867

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1c4399;
/* rgb */ color: rgb(28, 67, 153);
/* oklch */ color: oklch(41.0% 0.148 263.1);

Tailwind

colors: {
  custom: {
    50: '#6e76b8',
    500: '#1c4399',
    950: '#000000',
  },
}

SCSS

$custom: #1c4399;
$custom-light: #6e76b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4399",
  "rgb": {
    "r": 28,
    "g": 67,
    "b": 153
  },
  "hsl": {
    "h": 221.28,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.41024,
    "c": 0.14785,
    "h": 263.1
  },
  "luminance": 0.06561
}

Semantic roles & 50–950 ramp

primary

#1C4399

secondary

#C29E4F

accent

#B53CEC

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1C4399

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

Preview Lab → · Contrast checker → · Palette generator →