#1D358B#1D358B

#1D358B is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.146 H 266.9°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#1D358B
RGB	rgb(29, 53, 139)
HSL	hsl(227, 65%, 33%)
HSV	hsv(227, 79%, 55%)
CMYK	cmyk(79.1%, 61.9%, 0%, 45.5%)
CIE-LAB	lab(25.78, 23.75, -50.41)
CIE-LCH	lch(25.78, 55.73, 295.23°)
OKLab	oklab(36.92% -0.008 -0.1457)
OKLCH	oklch(36.92% 0.146 266.9)
XYZ	xyz(6.4384, 4.6708, 24.9833)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D358B #8B731D

analogous

#1D6C8B #1D358B #3C1D8B

triadic

#1D358B #8B1D35 #358B1D

tetradic

#1D358B #8B1D6C #8B731D #1D8B3C

square

#1D358B #8B1D6C #8B731D #1D8B3C

split-complementary

#1D358B #8B3C1D #6C8B1D

monochromatic

#080E26 #122258 #1D358B #2848BE #4969D9

Accessibility & contrast

On white

10.86

#1D358B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1D358B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D358B

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D358B	#FFFFFF	#000000	##FFFFFF
##1D358B	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428E

Deuteranopia (green-blind)

#003889

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d358b;
/* rgb */ color: rgb(29, 53, 139);
/* oklch */ color: oklch(36.9% 0.146 266.9);

Tailwind

colors: {
  custom: {
    50: '#6c6bae',
    500: '#1d358b',
    950: '#000000',
  },
}

SCSS

$custom: #1d358b;
$custom-light: #6c6bae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d358b",
  "rgb": {
    "r": 29,
    "g": 53,
    "b": 139
  },
  "hsl": {
    "h": 226.909,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36915,
    "c": 0.14592,
    "h": 266.9
  },
  "luminance": 0.04671
}

Semantic roles & 50–950 ramp

primary

#1D358B

secondary

#BBA249

accent

#C43FE8

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1D358B

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

Preview Lab → · Contrast checker → · Palette generator →