#1F258D#1F258D

#1F258D is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.3% C 0.167 H 271.1°. Best body text is #FFFFFF at 12.30:1 contrast (WCAG AA passes).

Color values

HEX	#1F258D
RGB	rgb(31, 37, 141)
HSL	hsl(237, 64%, 34%)
HSV	hsv(237, 78%, 55%)
CMYK	cmyk(78%, 73.8%, 0%, 44.7%)
CIE-LAB	lab(22.08, 35.32, -57.72)
CIE-LCH	lch(22.08, 67.67, 301.46°)
OKLab	oklab(34.3% 0.0032 -0.1671)
OKLCH	oklch(34.3% 0.167 271.1)
XYZ	xyz(6.0327, 3.5369, 25.5589)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F258D #8D871F

analogous

#1F5C8D #1F258D #501F8D

triadic

#1F258D #8D1F25 #258D1F

tetradic

#1F258D #8D1F5C #8D871F #1F8D50

square

#1F258D #8D1F5C #8D871F #1F8D50

split-complementary

#1F258D #8D501F #5C8D1F

monochromatic

#090B29 #14185B #1F258D #2A32BF #4E56D8

Accessibility & contrast

On white

12.30

#1F258D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F258D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F258D

12.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F258D	#FFFFFF	#000000	##FFFFFF
##1F258D	1.00	12.30	1.71	12.30
#FFFFFF	12.30	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A90

Deuteranopia (green-blind)

#002F8B

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f258d;
/* rgb */ color: rgb(31, 37, 141);
/* oklch */ color: oklch(34.3% 0.167 271.1);

Tailwind

colors: {
  custom: {
    50: '#6e60af',
    500: '#1f258d',
    950: '#000000',
  },
}

SCSS

$custom: #1f258d;
$custom-light: #6e60af;
$custom-dark: #000000;

JSON

{
  "hex": "#1f258d",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 141
  },
  "hsl": {
    "h": 236.727,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.34298,
    "c": 0.16714,
    "h": 271.1
  },
  "luminance": 0.03538
}

Semantic roles & 50–950 ramp

primary

#1F258D

secondary

#BBB54D

accent

#DE41E7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F258D

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

Preview Lab → · Contrast checker → · Palette generator →