#1F237F#1F237F

#1F237F is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.5% C 0.151 H 272.4°. Best body text is #FFFFFF at 13.08:1 contrast (WCAG AA passes).

Color values

HEX	#1F237F
RGB	rgb(31, 35, 127)
HSL	hsl(238, 61%, 31%)
HSV	hsv(238, 76%, 50%)
CMYK	cmyk(75.6%, 72.4%, 0%, 50.2%)
CIE-LAB	lab(20.14, 31.50, -52.12)
CIE-LCH	lch(20.14, 60.89, 301.15°)
OKLab	oklab(32.47% 0.0063 -0.1508)
OKLCH	oklch(32.47% 0.151 272.4)
XYZ	xyz(4.9956, 3.0252, 20.3952)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F237F #7F7B1F

analogous

#1F537F #1F237F #4B1F7F

triadic

#1F237F #7F1F23 #237F1F

tetradic

#1F237F #7F1F53 #7F7B1F #1F7F4B

square

#1F237F #7F1F53 #7F7B1F #1F7F4B

split-complementary

#1F237F #7F4B1F #537F1F

monochromatic

#07081D #13154E #1F237F #2B31B0 #464CD2

Accessibility & contrast

On white

13.08

#1F237F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1F237F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F237F

13.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F237F	#FFFFFF	#000000	##FFFFFF
##1F237F	1.00	13.08	1.61	13.08
#FFFFFF	13.08	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003582

Deuteranopia (green-blind)

#002C7D

Tritanopia (blue-blind)

#003C4E

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f237f;
/* rgb */ color: rgb(31, 35, 127);
/* oklch */ color: oklch(32.5% 0.151 272.4);

Tailwind

colors: {
  custom: {
    50: '#6b5ea5',
    500: '#1f237f',
    950: '#000000',
  },
}

SCSS

$custom: #1f237f;
$custom-light: #6b5ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f237f",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 127
  },
  "hsl": {
    "h": 237.5,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.32468,
    "c": 0.15089,
    "h": 272.4
  },
  "luminance": 0.03026
}

Semantic roles & 50–950 ramp

primary

#1F237F

secondary

#B2AE48

accent

#DD44E4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #1F237F

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

Preview Lab → · Contrast checker → · Palette generator →