#303D9D#303D9D

#303D9D is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.155 H 271.8°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#303D9D
RGB	rgb(48, 61, 157)
HSL	hsl(233, 53%, 40%)
HSV	hsv(233, 69%, 62%)
CMYK	cmyk(69.4%, 61.1%, 0%, 38.4%)
CIE-LAB	lab(30.40, 27.66, -53.87)
CIE-LCH	lch(30.40, 60.56, 297.18°)
OKLab	oklab(41.09% 0.0048 -0.1553)
OKLCH	oklch(41.09% 0.155 271.8)
XYZ	xyz(8.9714, 6.3993, 32.6542)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303D9D #9D9030

analogous

#30739D #303D9D #59309D

triadic

#303D9D #9D303D #3D9D30

tetradic

#303D9D #9D3073 #9D9030 #309D59

square

#303D9D #9D3073 #9D9030 #309D59

split-complementary

#303D9D #9D5930 #739D30

monochromatic

#13193F #222B6E #303D9D #4454C6 #737FD4

Accessibility & contrast

On white

9.21

#303D9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#303D9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303D9D

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303D9D	#FFFFFF	#000000	##FFFFFF
##303D9D	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA0

Deuteranopia (green-blind)

#00439B

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #303d9d;
/* rgb */ color: rgb(48, 61, 157);
/* oklch */ color: oklch(41.1% 0.155 271.8);

Tailwind

colors: {
  custom: {
    50: '#7772bb',
    500: '#303d9d',
    950: '#000000',
  },
}

SCSS

$custom: #303d9d;
$custom-light: #7772bb;
$custom-dark: #000000;

JSON

{
  "hex": "#303d9d",
  "rgb": {
    "r": 48,
    "g": 61,
    "b": 157
  },
  "hsl": {
    "h": 232.844,
    "s": 53.171,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41088,
    "c": 0.15542,
    "h": 271.8
  },
  "luminance": 0.064
}

Semantic roles & 50–950 ramp

primary

#303D9D

secondary

#BCB36D

accent

#CB4BDD

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #303D9D

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

Preview Lab → · Contrast checker → · Palette generator →