#283FA7#283FA7

#283FA7 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.9% C 0.169 H 268.4°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#283FA7
RGB	rgb(40, 63, 167)
HSL	hsl(229, 61%, 41%)
HSV	hsv(229, 76%, 65%)
CMYK	cmyk(76%, 62.3%, 0%, 34.5%)
CIE-LAB	lab(31.34, 29.02, -58.40)
CIE-LCH	lch(31.34, 65.21, 296.43°)
OKLab	oklab(41.93% -0.0048 -0.1688)
OKLCH	oklch(41.93% 0.169 268.4)
XYZ	xyz(9.6252, 6.7951, 37.3560)
Luminance	0.0680 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283FA7 #A79028

analogous

#287EA7 #283FA7 #5028A7

triadic

#283FA7 #A7283F #3FA728

tetradic

#283FA7 #A7287E #A79028 #28A750

square

#283FA7 #A7287E #A79028 #28A750

split-complementary

#283FA7 #A75028 #7EA728

monochromatic

#101A44 #1C2C76 #283FA7 #3C57D0 #6D81DC

Accessibility & contrast

On white

8.90

#283FA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#283FA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283FA7

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283FA7	#FFFFFF	#000000	##FFFFFF
##283FA7	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)

#0050AA

Deuteranopia (green-blind)

#0044A5

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #283fa7;
/* rgb */ color: rgb(40, 63, 167);
/* oklch */ color: oklch(41.9% 0.169 268.4);

Tailwind

colors: {
  custom: {
    50: '#7673c2',
    500: '#283fa7',
    950: '#000000',
  },
}

SCSS

$custom: #283fa7;
$custom-light: #7673c2;
$custom-dark: #000000;

JSON

{
  "hex": "#283fa7",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 167
  },
  "hsl": {
    "h": 229.134,
    "s": 61.353,
    "l": 40.588
  },
  "oklch": {
    "l": 0.4193,
    "c": 0.16884,
    "h": 268.4
  },
  "luminance": 0.06796
}

Semantic roles & 50–950 ramp

primary

#283FA7

secondary

#C3B268

accent

#C743E4

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283FA7

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

Preview Lab → · Contrast checker → · Palette generator →