#251BB3#251BB3

#251BB3 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.8% C 0.220 H 271.4°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#251BB3
RGB	rgb(37, 27, 179)
HSL	hsl(244, 74%, 40%)
HSV	hsv(244, 85%, 70%)
CMYK	cmyk(79.3%, 84.9%, 0%, 29.8%)
CIE-LAB	lab(25.05, 53.38, -75.97)
CIE-LCH	lch(25.05, 92.85, 305.09°)
OKLab	oklab(37.76% 0.0054 -0.2198)
OKLCH	oklch(37.76% 0.22 271.4)
XYZ	xyz(9.2888, 4.4308, 43.0048)
Luminance	0.0443 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251BB3 #A9B31B

analogous

#1B5DB3 #251BB3 #711BB3

triadic

#251BB3 #B3251B #1BB325

tetradic

#251BB3 #B31B5D #A9B31B #1BB371

square

#251BB3 #B31B5D #A9B31B #1BB371

split-complementary

#251BB3 #B3711B #5DB31B

monochromatic

#0F0B49 #1A137E #251BB3 #382CDF #6A61E7

Accessibility & contrast

On white

11.13

#251BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#251BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251BB3

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251BB3	#FFFFFF	#000000	##FFFFFF
##251BB3	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #251bb3;
/* rgb */ color: rgb(37, 27, 179);
/* oklch */ color: oklch(37.8% 0.220 271.4);

Tailwind

colors: {
  custom: {
    50: '#7b5dcb',
    500: '#251bb3',
    950: '#000000',
  },
}

SCSS

$custom: #251bb3;
$custom-light: #7b5dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#251bb3",
  "rgb": {
    "r": 37,
    "g": 27,
    "b": 179
  },
  "hsl": {
    "h": 243.947,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37758,
    "c": 0.21984,
    "h": 271.4
  },
  "luminance": 0.04432
}

Semantic roles & 50–950 ramp

primary

#251BB3

secondary

#C4CC5E

accent

#F037E4

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #251BB3

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

Preview Lab → · Contrast checker → · Palette generator →