#283EAF#283EAF

#283EAF is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.181 H 268.6°. Best body text is #FFFFFF at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#283EAF
RGB	rgb(40, 62, 175)
HSL	hsl(230, 63%, 42%)
HSV	hsv(230, 77%, 69%)
CMYK	cmyk(77.1%, 64.6%, 0%, 31.4%)
CIE-LAB	lab(31.79, 32.66, -62.45)
CIE-LCH	lch(31.79, 70.48, 297.61°)
OKLab	oklab(42.48% -0.0044 -0.1806)
OKLCH	oklch(42.48% 0.181 268.6)
XYZ	xyz(10.3329, 6.9904, 41.3538)
Luminance	0.0699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EAF #AF9928

analogous

#2882AF #283EAF #5528AF

triadic

#283EAF #AF283E #3EAF28

tetradic

#283EAF #AF2882 #AF9928 #28AF55

square

#283EAF #AF2882 #AF9928 #28AF55

split-complementary

#283EAF #AF5528 #82AF28

monochromatic

#111B4B #1D2C7D #283EAF #4159D4 #7384DF

Accessibility & contrast

On white

8.76

#283EAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#283EAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EAF

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EAF	#FFFFFF	#000000	##FFFFFF
##283EAF	1.00	8.76	2.40	8.76
#FFFFFF	8.76	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B3

Deuteranopia (green-blind)

#0045AD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #283eaf;
/* rgb */ color: rgb(40, 62, 175);
/* oklch */ color: oklch(42.5% 0.181 268.6);

Tailwind

colors: {
  custom: {
    50: '#7873c8',
    500: '#283eaf',
    950: '#000000',
  },
}

SCSS

$custom: #283eaf;
$custom-light: #7873c8;
$custom-dark: #000000;

JSON

{
  "hex": "#283eaf",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 175
  },
  "hsl": {
    "h": 230.222,
    "s": 62.791,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42478,
    "c": 0.1807,
    "h": 268.6
  },
  "luminance": 0.06992
}

Semantic roles & 50–950 ramp

primary

#283EAF

secondary

#C6B86D

accent

#CB42E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283EAF

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

Preview Lab → · Contrast checker → · Palette generator →