#1D278B#1D278B

#1D278B is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.3% C 0.163 H 270.1°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#1D278B
RGB	rgb(29, 39, 139)
HSL	hsl(235, 65%, 33%)
HSV	hsv(235, 79%, 55%)
CMYK	cmyk(79.1%, 71.9%, 0%, 45.5%)
CIE-LAB	lab(22.22, 33.15, -56.25)
CIE-LCH	lch(22.22, 65.29, 300.51°)
OKLab	oklab(34.31% 0.0003 -0.1629)
OKLCH	oklch(34.31% 0.163 270.1)
XYZ	xyz(5.8908, 3.5757, 24.8008)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D278B #8B811D

analogous

#1D5E8B #1D278B #4A1D8B

triadic

#1D278B #8B1D27 #278B1D

tetradic

#1D278B #8B1D5E #8B811D #1D8B4A

square

#1D278B #8B1D5E #8B811D #1D8B4A

split-complementary

#1D278B #8B4A1D #5E8B1D

monochromatic

#080B26 #121958 #1D278B #2835BE #4956D9

Accessibility & contrast

On white

12.24

#1D278B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1D278B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D278B

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D278B	#FFFFFF	#000000	##FFFFFF
##1D278B	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A8E

Deuteranopia (green-blind)

#003089

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1d278b;
/* rgb */ color: rgb(29, 39, 139);
/* oklch */ color: oklch(34.3% 0.163 270.1);

Tailwind

colors: {
  custom: {
    50: '#6d61ae',
    500: '#1d278b',
    950: '#000000',
  },
}

SCSS

$custom: #1d278b;
$custom-light: #6d61ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d278b",
  "rgb": {
    "r": 29,
    "g": 39,
    "b": 139
  },
  "hsl": {
    "h": 234.545,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.34305,
    "c": 0.16287,
    "h": 270.1
  },
  "luminance": 0.03576
}

Semantic roles & 50–950 ramp

primary

#1D278B

secondary

#BBB149

accent

#D93FE8

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1D278B

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

Preview Lab → · Contrast checker → · Palette generator →