#1C4BB3#1C4BB3

#1C4BB3 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.9% C 0.173 H 263.0°. Best body text is #FFFFFF at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#1C4BB3
RGB	rgb(28, 75, 179)
HSL	hsl(221, 73%, 41%)
HSV	hsv(221, 84%, 70%)
CMYK	cmyk(84.4%, 58.1%, 0%, 29.8%)
CIE-LAB	lab(35.07, 24.49, -59.48)
CIE-LCH	lch(35.07, 64.32, 292.38°)
OKLab	oklab(44.9% -0.0211 -0.172)
OKLCH	oklch(44.9% 0.173 263)
XYZ	xyz(11.1287, 8.5323, 43.6994)
Luminance	0.0853 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4BB3 #B3841C

analogous

#1C96B3 #1C4BB3 #391CB3

triadic

#1C4BB3 #B31C4B #4BB31C

tetradic

#1C4BB3 #B31C96 #B3841C #1CB339

square

#1C4BB3 #B31C96 #B3841C #1CB339

split-complementary

#1C4BB3 #B3391C #96B31C

monochromatic

#0B1F49 #14357E #1C4BB3 #2E65DE #638CE7

Accessibility & contrast

On white

7.76

#1C4BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1C4BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4BB3

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4BB3	#FFFFFF	#000000	##FFFFFF
##1C4BB3	1.00	7.76	2.71	7.76
#FFFFFF	7.76	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB7

Deuteranopia (green-blind)

#004CB1

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1c4bb3;
/* rgb */ color: rgb(28, 75, 179);
/* oklch */ color: oklch(44.9% 0.173 263.0);

Tailwind

colors: {
  custom: {
    50: '#747ccb',
    500: '#1c4bb3',
    950: '#000000',
  },
}

SCSS

$custom: #1c4bb3;
$custom-light: #747ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4bb3",
  "rgb": {
    "r": 28,
    "g": 75,
    "b": 179
  },
  "hsl": {
    "h": 221.325,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.44903,
    "c": 0.17326,
    "h": 263
  },
  "luminance": 0.08534
}

Semantic roles & 50–950 ramp

primary

#1C4BB3

secondary

#CBAA5F

accent

#B738F0

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1C4BB3

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

Preview Lab → · Contrast checker → · Palette generator →