#1D277B#1D277B

#1D277B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.6% C 0.141 H 270.8°. Best body text is #FFFFFF at 12.90:1 contrast (WCAG AA passes).

Color values

HEX	#1D277B
RGB	rgb(29, 39, 123)
HSL	hsl(234, 62%, 30%)
HSV	hsv(234, 76%, 48%)
CMYK	cmyk(76.4%, 68.3%, 0%, 51.8%)
CIE-LAB	lab(20.60, 27.12, -48.83)
CIE-LCH	lch(20.60, 55.85, 299.05°)
OKLab	oklab(32.65% 0.002 -0.1412)
OKLCH	oklch(32.65% 0.141 270.8)
XYZ	xyz(4.8061, 3.1418, 19.0882)
Luminance	0.0314 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D277B #7B711D

analogous

#1D567B #1D277B #421D7B

triadic

#1D277B #7B1D27 #277B1D

tetradic

#1D277B #7B1D56 #7B711D #1D7B42

square

#1D277B #7B1D56 #7B711D #1D7B42

split-complementary

#1D277B #7B421D #567B1D

monochromatic

#060819 #111749 #1D277B #2937AD #4050D2

Accessibility & contrast

On white

12.90

#1D277B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1D277B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D277B

12.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D277B	#FFFFFF	#000000	##FFFFFF
##1D277B	1.00	12.90	1.63	12.90
#FFFFFF	12.90	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367E

Deuteranopia (green-blind)

#002D79

Tritanopia (blue-blind)

#003D4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1d277b;
/* rgb */ color: rgb(29, 39, 123);
/* oklch */ color: oklch(32.6% 0.141 270.8);

Tailwind

colors: {
  custom: {
    50: '#6961a2',
    500: '#1d277b',
    950: '#000000',
  },
}

SCSS

$custom: #1d277b;
$custom-light: #6961a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d277b",
  "rgb": {
    "r": 29,
    "g": 39,
    "b": 123
  },
  "hsl": {
    "h": 233.617,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32646,
    "c": 0.1412,
    "h": 270.8
  },
  "luminance": 0.03142
}

Semantic roles & 50–950 ramp

primary

#1D277B

secondary

#AFA345

accent

#D443E5

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1D277B

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

Preview Lab → · Contrast checker → · Palette generator →