#1C4599#1C4599

#1C4599 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.5% C 0.145 H 262.4°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#1C4599
RGB	rgb(28, 69, 153)
HSL	hsl(220, 69%, 35%)
HSV	hsv(220, 82%, 60%)
CMYK	cmyk(81.7%, 54.9%, 0%, 40%)
CIE-LAB	lab(31.35, 18.21, -49.94)
CIE-LCH	lch(31.35, 53.15, 290.04°)
OKLab	oklab(41.45% -0.0192 -0.144)
OKLCH	oklch(41.45% 0.145 262.4)
XYZ	xyz(8.3547, 6.8020, 31.0034)
Luminance	0.0680 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4599 #99701C

analogous

#1C8399 #1C4599 #311C99

triadic

#1C4599 #991C45 #45991C

tetradic

#1C4599 #991C83 #99701C #1C9931

square

#1C4599 #991C83 #99701C #1C9931

split-complementary

#1C4599 #99311C #83991C

monochromatic

#091632 #132E65 #1C4599 #255CCD #507FDF

Accessibility & contrast

On white

8.90

#1C4599 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1C4599 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4599

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4599	#FFFFFF	#000000	##FFFFFF
##1C4599	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509C

Deuteranopia (green-blind)

#004497

Tritanopia (blue-blind)

#005A68

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1c4599;
/* rgb */ color: rgb(28, 69, 153);
/* oklch */ color: oklch(41.5% 0.145 262.4);

Tailwind

colors: {
  custom: {
    50: '#6e78b8',
    500: '#1c4599',
    950: '#000000',
  },
}

SCSS

$custom: #1c4599;
$custom-light: #6e78b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4599",
  "rgb": {
    "r": 28,
    "g": 69,
    "b": 153
  },
  "hsl": {
    "h": 220.32,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.41454,
    "c": 0.1453,
    "h": 262.4
  },
  "luminance": 0.06803
}

Semantic roles & 50–950 ramp

primary

#1C4599

secondary

#C29C4F

accent

#B23CEC

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1C4599

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

Preview Lab → · Contrast checker → · Palette generator →