#1D51AA#1D51AA

#1D51AA is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.5% C 0.153 H 260.5°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#1D51AA
RGB	rgb(29, 81, 170)
HSL	hsl(218, 71%, 39%)
HSV	hsv(218, 83%, 67%)
CMYK	cmyk(82.9%, 52.4%, 0%, 33.3%)
CIE-LAB	lab(36.07, 16.98, -52.50)
CIE-LCH	lch(36.07, 55.18, 287.93°)
OKLab	oklab(45.46% -0.0253 -0.1513)
OKLCH	oklch(45.46% 0.153 260.5)
XYZ	xyz(10.7022, 9.0470, 39.2046)
Luminance	0.0905 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D51AA #AA761D

analogous

#1D98AA #1D51AA #2F1DAA

triadic

#1D51AA #AA1D51 #51AA1D

tetradic

#1D51AA #AA1D98 #AA761D #1DAA2F

square

#1D51AA #AA1D98 #AA761D #1DAA2F

split-complementary

#1D51AA #AA2F1D #98AA1D

monochromatic

#0B1F41 #143876 #1D51AA #2A6BDB #5E8FE4

Accessibility & contrast

On white

7.47

#1D51AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1D51AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D51AA

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D51AA	#FFFFFF	#000000	##FFFFFF
##1D51AA	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#125CAD

Deuteranopia (green-blind)

#004FA8

Tritanopia (blue-blind)

#006775

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1d51aa;
/* rgb */ color: rgb(29, 81, 170);
/* oklch */ color: oklch(45.5% 0.153 260.5);

Tailwind

colors: {
  custom: {
    50: '#7281c4',
    500: '#1d51aa',
    950: '#000000',
  },
}

SCSS

$custom: #1d51aa;
$custom-light: #7281c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1d51aa",
  "rgb": {
    "r": 29,
    "g": 81,
    "b": 170
  },
  "hsl": {
    "h": 217.872,
    "s": 70.854,
    "l": 39.02
  },
  "oklch": {
    "l": 0.45457,
    "c": 0.15342,
    "h": 260.5
  },
  "luminance": 0.09048
}

Semantic roles & 50–950 ramp

primary

#1D51AA

secondary

#C8A05B

accent

#AB3AEE

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1D51AA

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

Preview Lab → · Contrast checker → · Palette generator →