#303EAB#303EAB

#303EAB is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.173 H 271.2°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#303EAB
RGB	rgb(48, 62, 171)
HSL	hsl(233, 56%, 43%)
HSV	hsv(233, 72%, 67%)
CMYK	cmyk(71.9%, 63.7%, 0%, 32.9%)
CIE-LAB	lab(31.84, 32.11, -59.96)
CIE-LCH	lch(31.84, 68.02, 298.17°)
OKLab	oklab(42.52% 0.0036 -0.1732)
OKLCH	oklch(42.52% 0.173 271.2)
XYZ	xyz(10.2897, 7.0129, 39.3315)
Luminance	0.0701 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.43

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#303EAB #AB9D30

analogous

#307BAB #303EAB #6030AB

triadic

#303EAB #AB303E #3EAB30

tetradic

#303EAB #AB307B #AB9D30 #30AB60

square

#303EAB #AB307B #AB9D30 #30AB60

split-complementary

#303EAB #AB6030 #7BAB30

monochromatic

#151B4B #232D7B #303EAB #4C5ACD #7B86DA

Accessibility & contrast

On white

8.74

#303EAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#303EAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #303EAB

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##303EAB	#FFFFFF	#000000	##FFFFFF
##303EAB	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AF

Deuteranopia (green-blind)

#0045A9

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #303eab;
/* rgb */ color: rgb(48, 62, 171);
/* oklch */ color: oklch(42.5% 0.173 271.2);

Tailwind

colors: {
  custom: {
    50: '#7a73c5',
    500: '#303eab',
    950: '#000000',
  },
}

SCSS

$custom: #303eab;
$custom-light: #7a73c5;
$custom-dark: #000000;

JSON

{
  "hex": "#303eab",
  "rgb": {
    "r": 48,
    "g": 62,
    "b": 171
  },
  "hsl": {
    "h": 233.171,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42517,
    "c": 0.17322,
    "h": 271.2
  },
  "luminance": 0.07014
}

Semantic roles & 50–950 ramp

primary

#303EAB

secondary

#C3BA74

accent

#CE48DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #303EAB

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

Preview Lab → · Contrast checker → · Palette generator →