#1F285B#1F285B

#1F285B is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.0% C 0.092 H 272.2°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#1F285B
RGB	rgb(31, 40, 91)
HSL	hsl(231, 49%, 24%)
HSV	hsv(231, 66%, 36%)
CMYK	cmyk(65.9%, 56%, 0%, 64.3%)
CIE-LAB	lab(18.21, 14.21, -31.92)
CIE-LCH	lch(18.21, 34.94, 293.99°)
OKLab	oklab(30.03% 0.0035 -0.0915)
OKLCH	oklch(30.03% 0.092 272.2)
XYZ	xyz(3.2116, 2.5640, 10.2212)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F285B #5B521F

analogous

#1F465B #1F285B #341F5B

triadic

#1F285B #5B1F28 #285B1F

tetradic

#1F285B #5B1F46 #5B521F #1F5B34

square

#1F285B #5B1F46 #5B521F #1F5B34

split-complementary

#1F285B #5B341F #465B1F

monochromatic

#080A17 #0F142D #1F285B #2F3C89 #3E50B6

Accessibility & contrast

On white

13.88

#1F285B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1F285B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F285B

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F285B	#FFFFFF	#000000	##FFFFFF
##1F285B	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A2F5D

Deuteranopia (green-blind)

#002A5A

Tritanopia (blue-blind)

#00343D

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1f285b;
/* rgb */ color: rgb(31, 40, 91);
/* oklch */ color: oklch(30.0% 0.092 272.2);

Tailwind

colors: {
  custom: {
    50: '#62618a',
    500: '#1f285b',
    950: '#000000',
  },
}

SCSS

$custom: #1f285b;
$custom-light: #62618a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f285b",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 91
  },
  "hsl": {
    "h": 231,
    "s": 49.18,
    "l": 23.922
  },
  "oklch": {
    "l": 0.30028,
    "c": 0.09155,
    "h": 272.2
  },
  "luminance": 0.02564
}

Semantic roles & 50–950 ramp

primary

#1F285B

secondary

#908546

accent

#C44FD9

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05050C

muted

#7A797D

Preview Lab

Preview with #1F285B

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

Preview Lab → · Contrast checker → · Palette generator →