#1F2977#1F2977

#1F2977 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.8% C 0.132 H 271.3°. Best body text is #FFFFFF at 12.79:1 contrast (WCAG AA passes).

Color values

HEX	#1F2977
RGB	rgb(31, 41, 119)
HSL	hsl(233, 59%, 29%)
HSV	hsv(233, 74%, 47%)
CMYK	cmyk(73.9%, 65.5%, 0%, 53.3%)
CIE-LAB	lab(20.86, 24.47, -45.85)
CIE-LCH	lch(20.86, 51.97, 298.09°)
OKLab	oklab(32.75% 0.003 -0.1324)
OKLCH	oklch(32.75% 0.132 271.3)
XYZ	xyz(4.6867, 3.2086, 17.8215)
Luminance	0.0321 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2977 #776D1F

analogous

#1F5577 #1F2977 #411F77

triadic

#1F2977 #771F29 #29771F

tetradic

#1F2977 #771F55 #776D1F #1F7741

square

#1F2977 #771F55 #776D1F #1F7741

split-complementary

#1F2977 #77411F #55771F

monochromatic

#060818 #121846 #1F2977 #2C3AA8 #4352CE

Accessibility & contrast

On white

12.79

#1F2977 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F2977 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2977

12.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2977	#FFFFFF	#000000	##FFFFFF
##1F2977	1.00	12.79	1.64	12.79
#FFFFFF	12.79	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367A

Deuteranopia (green-blind)

#002E76

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f2977;
/* rgb */ color: rgb(31, 41, 119);
/* oklch */ color: oklch(32.8% 0.132 271.3);

Tailwind

colors: {
  custom: {
    50: '#68629f',
    500: '#1f2977',
    950: '#000000',
  },
}

SCSS

$custom: #1f2977;
$custom-light: #68629f;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2977",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 119
  },
  "hsl": {
    "h": 233.182,
    "s": 58.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.3275,
    "c": 0.13243,
    "h": 271.3
  },
  "luminance": 0.03209
}

Semantic roles & 50–950 ramp

primary

#1F2977

secondary

#AB9F47

accent

#D046E2

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050F

muted

#7A797E

Preview Lab

Preview with #1F2977

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

Preview Lab → · Contrast checker → · Palette generator →