#1F2979#1F2979

#1F2979 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 32.9% C 0.135 H 271.2°. Best body text is #FFFFFF at 12.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F2979
RGB	rgb(31, 41, 121)
HSL	hsl(233, 59%, 30%)
HSV	hsv(233, 74%, 47%)
CMYK	cmyk(74.4%, 66.1%, 0%, 52.5%)
CIE-LAB	lab(21.05, 25.24, -46.82)
CIE-LCH	lch(21.05, 53.19, 298.32°)
OKLab	oklab(32.94% 0.0029 -0.1353)
OKLCH	oklch(32.94% 0.135 271.2)
XYZ	xyz(4.8080, 3.2572, 18.4608)
Luminance	0.0326 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2979 #796F1F

analogous

#1F5679 #1F2979 #421F79

triadic

#1F2979 #791F29 #29791F

tetradic

#1F2979 #791F56 #796F1F #1F7942

square

#1F2979 #791F56 #796F1F #1F7942

split-complementary

#1F2979 #79421F #56791F

monochromatic

#060818 #131848 #1F2979 #2B3AAA #4353CF

Accessibility & contrast

On white

12.71

#1F2979 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1F2979 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2979

12.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2979	#FFFFFF	#000000	##FFFFFF
##1F2979	1.00	12.71	1.65	12.71
#FFFFFF	12.71	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377C

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f2979;
/* rgb */ color: rgb(31, 41, 121);
/* oklch */ color: oklch(32.9% 0.135 271.2);

Tailwind

colors: {
  custom: {
    50: '#6962a0',
    500: '#1f2979',
    950: '#000000',
  },
}

SCSS

$custom: #1f2979;
$custom-light: #6962a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2979",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 121
  },
  "hsl": {
    "h": 233.333,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32943,
    "c": 0.13529,
    "h": 271.2
  },
  "luminance": 0.03258
}

Semantic roles & 50–950 ramp

primary

#1F2979

secondary

#ACA147

accent

#D145E2

background

#F6F5FA

surface

#ECEAF3

border

#C7C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F2979

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

Preview Lab → · Contrast checker → · Palette generator →