#1F258E#1F258E

#1F258E is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.168 H 271.0°. Best body text is #FFFFFF at 12.26:1 contrast (WCAG AA passes).

Color values

HEX	#1F258E
RGB	rgb(31, 37, 142)
HSL	hsl(237, 64%, 34%)
HSV	hsv(237, 78%, 56%)
CMYK	cmyk(78.2%, 73.9%, 0%, 44.3%)
CIE-LAB	lab(22.18, 35.68, -58.17)
CIE-LCH	lch(22.18, 68.24, 301.52°)
OKLab	oklab(34.41% 0.0031 -0.1684)
OKLCH	oklch(34.41% 0.168 271)
XYZ	xyz(6.1075, 3.5668, 25.9525)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F258E #8E881F

analogous

#1F5D8E #1F258E #511F8E

triadic

#1F258E #8E1F25 #258E1F

tetradic

#1F258E #8E1F5D #8E881F #1F8E51

square

#1F258E #8E1F5D #8E881F #1F8E51

split-complementary

#1F258E #8E511F #5D8E1F

monochromatic

#090B2A #14185C #1F258E #2A32C0 #4F56D9

Accessibility & contrast

On white

12.26

#1F258E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F258E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F258E

12.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F258E	#FFFFFF	#000000	##FFFFFF
##1F258E	1.00	12.26	1.71	12.26
#FFFFFF	12.26	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A91

Deuteranopia (green-blind)

#00308C

Tritanopia (blue-blind)

#004357

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f258e;
/* rgb */ color: rgb(31, 37, 142);
/* oklch */ color: oklch(34.4% 0.168 271.0);

Tailwind

colors: {
  custom: {
    50: '#6f60b0',
    500: '#1f258e',
    950: '#000000',
  },
}

SCSS

$custom: #1f258e;
$custom-light: #6f60b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f258e",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 142
  },
  "hsl": {
    "h": 236.757,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.34406,
    "c": 0.16844,
    "h": 271
  },
  "luminance": 0.03567
}

Semantic roles & 50–950 ramp

primary

#1F258E

secondary

#BBB64D

accent

#DE41E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F258E

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

Preview Lab → · Contrast checker → · Palette generator →