#1F278D#1F278D

#1F278D is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.6% C 0.165 H 270.8°. Best body text is #FFFFFF at 12.12:1 contrast (WCAG AA passes).

Color values

HEX	#1F278D
RGB	rgb(31, 39, 141)
HSL	hsl(236, 64%, 34%)
HSV	hsv(236, 78%, 55%)
CMYK	cmyk(78%, 72.3%, 0%, 44.7%)
CIE-LAB	lab(22.53, 34.07, -56.98)
CIE-LCH	lch(22.53, 66.38, 300.88°)
OKLab	oklab(34.62% 0.0022 -0.1649)
OKLCH	oklch(34.62% 0.165 270.8)
XYZ	xyz(6.0967, 3.6648, 25.5802)
Luminance	0.0367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F278D #8D851F

analogous

#1F5E8D #1F278D #4E1F8D

triadic

#1F278D #8D1F27 #278D1F

tetradic

#1F278D #8D1F5E #8D851F #1F8D4E

square

#1F278D #8D1F5E #8D851F #1F8D4E

split-complementary

#1F278D #8D4E1F #5E8D1F

monochromatic

#090B29 #14195B #1F278D #2A35BF #4E58D8

Accessibility & contrast

On white

12.12

#1F278D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1F278D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F278D

12.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F278D	#FFFFFF	#000000	##FFFFFF
##1F278D	1.00	12.12	1.73	12.12
#FFFFFF	12.12	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B90

Deuteranopia (green-blind)

#00308B

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f278d;
/* rgb */ color: rgb(31, 39, 141);
/* oklch */ color: oklch(34.6% 0.165 270.8);

Tailwind

colors: {
  custom: {
    50: '#6e62af',
    500: '#1f278d',
    950: '#000000',
  },
}

SCSS

$custom: #1f278d;
$custom-light: #6e62af;
$custom-dark: #000000;

JSON

{
  "hex": "#1f278d",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 141
  },
  "hsl": {
    "h": 235.636,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.34623,
    "c": 0.16496,
    "h": 270.8
  },
  "luminance": 0.03665
}

Semantic roles & 50–950 ramp

primary

#1F278D

secondary

#BBB34D

accent

#DB41E7

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080511

muted

#7B7980

Preview Lab

Preview with #1F278D

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

Preview Lab → · Contrast checker → · Palette generator →