#1C4E9B#1C4E9B

#1C4E9B is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.6% C 0.137 H 259.1°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#1C4E9B
RGB	rgb(28, 78, 155)
HSL	hsl(216, 69%, 36%)
HSV	hsv(216, 82%, 61%)
CMYK	cmyk(81.9%, 49.7%, 0%, 39.2%)
CIE-LAB	lab(34.11, 12.89, -46.69)
CIE-LCH	lch(34.11, 48.43, 285.44°)
OKLab	oklab(43.61% -0.0257 -0.1343)
OKLCH	oklch(43.61% 0.137 259.1)
XYZ	xyz(9.1175, 8.0611, 32.0794)
Luminance	0.0806 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4E9B #9B691C

analogous

#1C8D9B #1C4E9B #291C9B

triadic

#1C4E9B #9B1C4E #4E9B1C

tetradic

#1C4E9B #9B1C8D #9B691C #1C9B29

square

#1C4E9B #9B1C8D #9B691C #1C9B29

split-complementary

#1C4E9B #9B291C #8D9B1C

monochromatic

#091A33 #133467 #1C4E9B #2568CF #528AE0

Accessibility & contrast

On white

8.04

#1C4E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1C4E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4E9B

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4E9B	#FFFFFF	#000000	##FFFFFF
##1C4E9B	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20569E

Deuteranopia (green-blind)

#004B99

Tritanopia (blue-blind)

#00616D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1c4e9b;
/* rgb */ color: rgb(28, 78, 155);
/* oklch */ color: oklch(43.6% 0.137 259.1);

Tailwind

colors: {
  custom: {
    50: '#6e7eb9',
    500: '#1c4e9b',
    950: '#000000',
  },
}

SCSS

$custom: #1c4e9b;
$custom-light: #6e7eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4e9b",
  "rgb": {
    "r": 28,
    "g": 78,
    "b": 155
  },
  "hsl": {
    "h": 216.378,
    "s": 69.399,
    "l": 35.882
  },
  "oklch": {
    "l": 0.43605,
    "c": 0.13673,
    "h": 259.1
  },
  "luminance": 0.08062
}

Semantic roles & 50–950 ramp

primary

#1C4E9B

secondary

#C39650

accent

#A73CEC

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1C4E9B

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

Preview Lab → · Contrast checker → · Palette generator →