#1D308B#1D308B

#1D308B is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.9% C 0.152 H 268.2°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#1D308B
RGB	rgb(29, 48, 139)
HSL	hsl(230, 65%, 33%)
HSV	hsv(230, 79%, 55%)
CMYK	cmyk(79.1%, 65.5%, 0%, 45.5%)
CIE-LAB	lab(24.44, 27.18, -52.59)
CIE-LCH	lch(24.44, 59.20, 297.33°)
OKLab	oklab(35.93% -0.0047 -0.1521)
OKLCH	oklch(35.93% 0.152 268.2)
XYZ	xyz(6.2222, 4.2385, 24.9113)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D308B #8B781D

analogous

#1D678B #1D308B #411D8B

triadic

#1D308B #8B1D30 #308B1D

tetradic

#1D308B #8B1D67 #8B781D #1D8B41

square

#1D308B #8B1D67 #8B781D #1D8B41

split-complementary

#1D308B #8B411D #678B1D

monochromatic

#080D26 #121F58 #1D308B #2841BE #4962D9

Accessibility & contrast

On white

11.36

#1D308B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1D308B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D308B

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D308B	#FFFFFF	#000000	##FFFFFF
##1D308B	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8E

Deuteranopia (green-blind)

#003589

Tritanopia (blue-blind)

#004859

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d308b;
/* rgb */ color: rgb(29, 48, 139);
/* oklch */ color: oklch(35.9% 0.152 268.2);

Tailwind

colors: {
  custom: {
    50: '#6c68ae',
    500: '#1d308b',
    950: '#000000',
  },
}

SCSS

$custom: #1d308b;
$custom-light: #6c68ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d308b",
  "rgb": {
    "r": 29,
    "g": 48,
    "b": 139
  },
  "hsl": {
    "h": 229.636,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.35929,
    "c": 0.1522,
    "h": 268.2
  },
  "luminance": 0.04239
}

Semantic roles & 50–950 ramp

primary

#1D308B

secondary

#BBA749

accent

#CB3FE8

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1D308B

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

Preview Lab → · Contrast checker → · Palette generator →