#1D4BBB#1D4BBB

#1D4BBB is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.184 H 263.7°. Best body text is #FFFFFF at 7.56:1 contrast (WCAG AA passes).

Color values

HEX	#1D4BBB
RGB	rgb(29, 75, 187)
HSL	hsl(223, 73%, 42%)
HSV	hsv(223, 84%, 73%)
CMYK	cmyk(84.5%, 59.9%, 0%, 26.7%)
CIE-LAB	lab(35.75, 27.69, -63.08)
CIE-LCH	lch(35.75, 68.89, 293.70°)
OKLab	oklab(45.63% -0.0202 -0.1825)
OKLCH	oklch(45.63% 0.184 263.7)
XYZ	xyz(11.9892, 8.8797, 48.0861)
Luminance	0.0888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4BBB #BB8D1D

analogous

#1D9ABB #1D4BBB #3E1DBB

triadic

#1D4BBB #BB1D4B #4BBB1D

tetradic

#1D4BBB #BB1D9A #BB8D1D #1DBB3E

square

#1D4BBB #BB1D9A #BB8D1D #1DBB3E

split-complementary

#1D4BBB #BB3E1D #9ABB1D

monochromatic

#0D2051 #153686 #1D4BBB #3567E0 #6A8FE8

Accessibility & contrast

On white

7.56

#1D4BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#1D4BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4BBB

7.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4BBB	#FFFFFF	#000000	##FFFFFF
##1D4BBB	1.00	7.56	2.78	7.56
#FFFFFF	7.56	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBF

Deuteranopia (green-blind)

#004DB9

Tritanopia (blue-blind)

#00687B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1d4bbb;
/* rgb */ color: rgb(29, 75, 187);
/* oklch */ color: oklch(45.6% 0.184 263.7);

Tailwind

colors: {
  custom: {
    50: '#777cd0',
    500: '#1d4bbb',
    950: '#000000',
  },
}

SCSS

$custom: #1d4bbb;
$custom-light: #777cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4bbb",
  "rgb": {
    "r": 29,
    "g": 75,
    "b": 187
  },
  "hsl": {
    "h": 222.532,
    "s": 73.148,
    "l": 42.353
  },
  "oklch": {
    "l": 0.45628,
    "c": 0.18362,
    "h": 263.7
  },
  "luminance": 0.08881
}

Semantic roles & 50–950 ramp

primary

#1D4BBB

secondary

#CEB066

accent

#BA38F0

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0914

muted

#7C7B82

Preview Lab

Preview with #1D4BBB

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

Preview Lab → · Contrast checker → · Palette generator →