#1F237E#1F237E

#1F237E is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.4% C 0.150 H 272.5°. Best body text is #FFFFFF at 13.13:1 contrast (WCAG AA passes).

Color values

HEX	#1F237E
RGB	rgb(31, 35, 126)
HSL	hsl(237, 61%, 31%)
HSV	hsv(237, 75%, 49%)
CMYK	cmyk(75.4%, 72.2%, 0%, 50.6%)
CIE-LAB	lab(20.04, 31.13, -51.65)
CIE-LCH	lch(20.04, 60.31, 301.08°)
OKLab	oklab(32.36% 0.0065 -0.1494)
OKLCH	oklch(32.36% 0.15 272.5)
XYZ	xyz(4.9307, 2.9992, 20.0537)
Luminance	0.0300 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F237E #7E7A1F

analogous

#1F527E #1F237E #4A1F7E

triadic

#1F237E #7E1F23 #237E1F

tetradic

#1F237E #7E1F52 #7E7A1F #1F7E4A

square

#1F237E #7E1F52 #7E7A1F #1F7E4A

split-complementary

#1F237E #7E4A1F #527E1F

monochromatic

#07081C #13154D #1F237E #2B31AF #464CD1

Accessibility & contrast

On white

13.13

#1F237E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1F237E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F237E

13.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F237E	#FFFFFF	#000000	##FFFFFF
##1F237E	1.00	13.13	1.60	13.13
#FFFFFF	13.13	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003581

Deuteranopia (green-blind)

#002C7C

Tritanopia (blue-blind)

#003C4D

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f237e;
/* rgb */ color: rgb(31, 35, 126);
/* oklch */ color: oklch(32.4% 0.150 272.5);

Tailwind

colors: {
  custom: {
    50: '#6b5ea4',
    500: '#1f237e',
    950: '#000000',
  },
}

SCSS

$custom: #1f237e;
$custom-light: #6b5ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f237e",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 126
  },
  "hsl": {
    "h": 237.474,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.32362,
    "c": 0.14954,
    "h": 272.5
  },
  "luminance": 0.03
}

Semantic roles & 50–950 ramp

primary

#1F237E

secondary

#B1AD48

accent

#DD44E4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #1F237E

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

Preview Lab → · Contrast checker → · Palette generator →