#1D51BC#1D51BC

#1D51BC is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.9% C 0.178 H 262.4°. Best body text is #FFFFFF at 7.11:1 contrast (WCAG AA passes).

Color values

HEX	#1D51BC
RGB	rgb(29, 81, 188)
HSL	hsl(220, 73%, 43%)
HSV	hsv(220, 85%, 74%)
CMYK	cmyk(84.6%, 56.9%, 0%, 26.3%)
CIE-LAB	lab(37.44, 24.10, -60.92)
CIE-LCH	lch(37.44, 65.51, 291.58°)
OKLab	oklab(46.92% -0.0236 -0.1761)
OKLCH	oklch(46.92% 0.178 262.4)
XYZ	xyz(12.5230, 9.7753, 48.7940)
Luminance	0.0978 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D51BC #BC881D

analogous

#1DA1BC #1D51BC #381DBC

triadic

#1D51BC #BC1D51 #51BC1D

tetradic

#1D51BC #BC1DA1 #BC881D #1DBC38

square

#1D51BC #BC1DA1 #BC881D #1DBC38

split-complementary

#1D51BC #BC381D #A1BC1D

monochromatic

#0D2352 #153A87 #1D51BC #366EE0 #6B94E8

Accessibility & contrast

On white

7.11

#1D51BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#1D51BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D51BC

7.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D51BC	#FFFFFF	#000000	##FFFFFF
##1D51BC	1.00	7.11	2.96	7.11
#FFFFFF	7.11	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060C0

Deuteranopia (green-blind)

#0051BA

Tritanopia (blue-blind)

#006C7E

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #1d51bc;
/* rgb */ color: rgb(29, 81, 188);
/* oklch */ color: oklch(46.9% 0.178 262.4);

Tailwind

colors: {
  custom: {
    50: '#7681d1',
    500: '#1d51bc',
    950: '#000000',
  },
}

SCSS

$custom: #1d51bc;
$custom-light: #7681d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d51bc",
  "rgb": {
    "r": 29,
    "g": 81,
    "b": 188
  },
  "hsl": {
    "h": 220.377,
    "s": 73.272,
    "l": 42.549
  },
  "oklch": {
    "l": 0.46919,
    "c": 0.17764,
    "h": 262.4
  },
  "luminance": 0.09777
}

Semantic roles & 50–950 ramp

primary

#1D51BC

secondary

#CEAC67

accent

#B438F0

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0A14

muted

#7C7C82

Preview Lab

Preview with #1D51BC

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

Preview Lab → · Contrast checker → · Palette generator →