#303B79#303B79

#303B79 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.8% C 0.106 H 272.8°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#303B79
RGB	rgb(48, 59, 121)
HSL	hsl(231, 43%, 33%)
HSV	hsv(231, 60%, 47%)
CMYK	cmyk(60.3%, 51.2%, 0%, 52.5%)
CIE-LAB	lab(27.12, 15.77, -36.92)
CIE-LCH	lch(27.12, 40.15, 293.13°)
OKLab	oklab(37.77% 0.0051 -0.1055)
OKLCH	oklch(37.77% 0.106 272.8)
XYZ	xyz(6.2329, 5.1363, 18.7484)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303B79 #796E30

analogous

#305F79 #303B79 #493079

triadic

#303B79 #79303B #3B7930

tetradic

#303B79 #79305F #796E30 #307949

square

#303B79 #79305F #796E30 #307949

split-complementary

#303B79 #794930 #5F7930

monochromatic

#0D1021 #1F264D #303B79 #4150A5 #6271C1

Accessibility & contrast

On white

10.36

#303B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#303B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303B79

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303B79	#FFFFFF	#000000	##FFFFFF
##303B79	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C437B

Deuteranopia (green-blind)

#0F3D78

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #303b79;
/* rgb */ color: rgb(48, 59, 121);
/* oklch */ color: oklch(37.8% 0.106 272.8);

Tailwind

colors: {
  custom: {
    50: '#6f70a0',
    500: '#303b79',
    950: '#000000',
  },
}

SCSS

$custom: #303b79;
$custom-light: #6f70a0;
$custom-dark: #000000;

JSON

{
  "hex": "#303b79",
  "rgb": {
    "r": 48,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 230.959,
    "s": 43.195,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37768,
    "c": 0.10562,
    "h": 272.8
  },
  "luminance": 0.05137
}

Semantic roles & 50–950 ramp

primary

#303B79

secondary

#A89D5D

accent

#C055D3

background

#F7F6F9

surface

#EDECF2

border

#C8C7CC

text

#08070F

muted

#7B7A7E

Preview Lab

Preview with #303B79

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

Preview Lab → · Contrast checker → · Palette generator →