#251FBD#251FBD

#251FBD is a dark, highly saturated blue. Relative luminance 0.050; OKLCH L 39.4% C 0.228 H 270.6°. Best body text is #FFFFFF at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#251FBD
RGB	rgb(37, 31, 189)
HSL	hsl(242, 72%, 43%)
HSV	hsv(242, 84%, 74%)
CMYK	cmyk(80.4%, 83.6%, 0%, 25.9%)
CIE-LAB	lab(26.87, 54.65, -78.90)
CIE-LCH	lch(26.87, 95.98, 304.71°)
OKLab	oklab(39.36% 0.0023 -0.2283)
OKLCH	oklch(39.36% 0.228 270.6)
XYZ	xyz(10.4351, 5.0462, 48.5583)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#251FBD #B7BD1F

analogous

#1F68BD #251FBD #741FBD

triadic

#251FBD #BD251F #1FBD25

tetradic

#251FBD #BD1F68 #B7BD1F #1FBD74

square

#251FBD #BD1F68 #B7BD1F #1FBD74

split-complementary

#251FBD #BD741F #68BD1F

monochromatic

#100E54 #1B1688 #251FBD #413ADF #746FE7

Accessibility & contrast

On white

10.45

#251FBD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#251FBD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #251FBD

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##251FBD	#FFFFFF	#000000	##FFFFFF
##251FBD	1.00	10.45	2.01	10.45
#FFFFFF	10.45	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047C1

Deuteranopia (green-blind)

#0037BA

Tritanopia (blue-blind)

#005371

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #251fbd;
/* rgb */ color: rgb(37, 31, 189);
/* oklch */ color: oklch(39.4% 0.228 270.6);

Tailwind

colors: {
  custom: {
    50: '#7d60d2',
    500: '#251fbd',
    950: '#000000',
  },
}

SCSS

$custom: #251fbd;
$custom-light: #7d60d2;
$custom-dark: #000000;

JSON

{
  "hex": "#251fbd",
  "rgb": {
    "r": 37,
    "g": 31,
    "b": 189
  },
  "hsl": {
    "h": 242.278,
    "s": 71.818,
    "l": 43.137
  },
  "oklch": {
    "l": 0.39363,
    "c": 0.22833,
    "h": 270.6
  },
  "luminance": 0.05047
}

Semantic roles & 50–950 ramp

primary

#251FBD

secondary

#CACE6A

accent

#EF39E8

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #251FBD

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

Preview Lab → · Contrast checker → · Palette generator →