#303D71#303D71

#303D71 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.6% C 0.090 H 271.0°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#303D71
RGB	rgb(48, 61, 113)
HSL	hsl(228, 40%, 32%)
HSV	hsv(228, 58%, 44%)
CMYK	cmyk(57.5%, 46%, 0%, 55.7%)
CIE-LAB	lab(27.18, 11.49, -31.76)
CIE-LCH	lch(27.18, 33.78, 289.89°)
OKLab	oklab(37.64% 0.0015 -0.0903)
OKLCH	oklch(37.64% 0.09 271)
XYZ	xyz(5.8673, 5.1577, 16.3059)
Luminance	0.0516 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303D71 #716430

analogous

#305E71 #303D71 #443071

triadic

#303D71 #71303D #3D7130

tetradic

#303D71 #71305E #716430 #307144

square

#303D71 #71305E #716430 #307144

split-complementary

#303D71 #714430 #5E7130

monochromatic

#0C0F1B #1E2646 #303D71 #42549C #6072BB

Accessibility & contrast

On white

10.34

#303D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#303D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303D71

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303D71	#FFFFFF	#000000	##FFFFFF
##303D71	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264373

Deuteranopia (green-blind)

#1F3E70

Tritanopia (blue-blind)

#0D4851

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #303d71;
/* rgb */ color: rgb(48, 61, 113);
/* oklch */ color: oklch(37.6% 0.090 271.0);

Tailwind

colors: {
  custom: {
    50: '#6e729a',
    500: '#303d71',
    950: '#000000',
  },
}

SCSS

$custom: #303d71;
$custom-light: #6e729a;
$custom-dark: #000000;

JSON

{
  "hex": "#303d71",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 113
  },
  "hsl": {
    "h": 228,
    "s": 40.373,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37644,
    "c": 0.09033,
    "h": 271
  },
  "luminance": 0.05158
}

Semantic roles & 50–950 ramp

primary

#303D71

secondary

#A2945B

accent

#B858D0

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #303D71

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

Preview Lab → · Contrast checker → · Palette generator →