#1D237B#1D237B

#1D237B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.9% C 0.146 H 271.8°. Best body text is #FFFFFF at 13.30:1 contrast (WCAG AA passes).

Color values

HEX	#1D237B
RGB	rgb(29, 35, 123)
HSL	hsl(236, 62%, 30%)
HSV	hsv(236, 76%, 48%)
CMYK	cmyk(76.4%, 71.5%, 0%, 51.8%)
CIE-LAB	lab(19.61, 29.80, -50.46)
CIE-LCH	lch(19.61, 58.60, 300.56°)
OKLab	oklab(31.92% 0.0045 -0.146)
OKLCH	oklch(31.92% 0.146 271.8)
XYZ	xyz(4.6817, 2.8928, 19.0467)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D237B #7B751D

analogous

#1D527B #1D237B #461D7B

triadic

#1D237B #7B1D23 #237B1D

tetradic

#1D237B #7B1D52 #7B751D #1D7B46

square

#1D237B #7B1D52 #7B751D #1D7B46

split-complementary

#1D237B #7B461D #527B1D

monochromatic

#060719 #111549 #1D237B #2931AD #404AD2

Accessibility & contrast

On white

13.30

#1D237B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1D237B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D237B

13.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D237B	#FFFFFF	#000000	##FFFFFF
##1D237B	1.00	13.30	1.58	13.30
#FFFFFF	13.30	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002B79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d237b;
/* rgb */ color: rgb(29, 35, 123);
/* oklch */ color: oklch(31.9% 0.146 271.8);

Tailwind

colors: {
  custom: {
    50: '#695ea2',
    500: '#1d237b',
    950: '#000000',
  },
}

SCSS

$custom: #1d237b;
$custom-light: #695ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d237b",
  "rgb": {
    "r": 29,
    "g": 35,
    "b": 123
  },
  "hsl": {
    "h": 236.17,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31924,
    "c": 0.14604,
    "h": 271.8
  },
  "luminance": 0.02893
}

Semantic roles & 50–950 ramp

primary

#1D237B

secondary

#AFA845

accent

#DB43E5

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1D237B

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

Preview Lab → · Contrast checker → · Palette generator →