#251FB3#251FB3

#251FB3 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.2% C 0.217 H 271.2°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#251FB3
RGB	rgb(37, 31, 179)
HSL	hsl(242, 70%, 41%)
HSV	hsv(242, 83%, 70%)
CMYK	cmyk(79.3%, 82.7%, 0%, 29.8%)
CIE-LAB	lab(25.64, 51.62, -74.98)
CIE-LCH	lch(25.64, 91.03, 304.54°)
OKLab	oklab(38.17% 0.0046 -0.217)
OKLCH	oklch(38.17% 0.217 271.2)
XYZ	xyz(9.3869, 4.6269, 43.0374)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251FB3 #ADB31F

analogous

#1F63B3 #251FB3 #6F1FB3

triadic

#251FB3 #B3251F #1FB325

tetradic

#251FB3 #B31F63 #ADB31F #1FB36F

square

#251FB3 #B31F63 #ADB31F #1FB36F

split-complementary

#251FB3 #B36F1F #63B31F

monochromatic

#0F0D4B #1A167F #251FB3 #3A33DC #6D68E5

Accessibility & contrast

On white

10.91

#251FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#251FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251FB3

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251FB3	#FFFFFF	#000000	##FFFFFF
##251FB3	1.00	10.91	1.93	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0035B1

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #251fb3;
/* rgb */ color: rgb(37, 31, 179);
/* oklch */ color: oklch(38.2% 0.217 271.2);

Tailwind

colors: {
  custom: {
    50: '#7b5fcb',
    500: '#251fb3',
    950: '#000000',
  },
}

SCSS

$custom: #251fb3;
$custom-light: #7b5fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#251fb3",
  "rgb": {
    "r": 37,
    "g": 31,
    "b": 179
  },
  "hsl": {
    "h": 242.432,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.38169,
    "c": 0.21703,
    "h": 271.2
  },
  "luminance": 0.04628
}

Semantic roles & 50–950 ramp

primary

#251FB3

secondary

#C6CA64

accent

#ED3BE6

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #251FB3

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

Preview Lab → · Contrast checker → · Palette generator →