#1C51AB#1C51AB

#1C51AB is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.5% C 0.155 H 260.4°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#1C51AB
RGB	rgb(28, 81, 171)
HSL	hsl(218, 72%, 39%)
HSV	hsv(218, 84%, 67%)
CMYK	cmyk(83.6%, 52.6%, 0%, 32.9%)
CIE-LAB	lab(36.12, 17.29, -53.02)
CIE-LCH	lch(36.12, 55.77, 288.06°)
OKLab	oklab(45.51% -0.0258 -0.1529)
OKLCH	oklch(45.51% 0.155 260.4)
XYZ	xyz(10.7693, 9.0707, 39.7034)
Luminance	0.0907 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C51AB #AB761C

analogous

#1C99AB #1C51AB #2F1CAB

triadic

#1C51AB #AB1C51 #51AB1C

tetradic

#1C51AB #AB1C99 #AB761C #1CAB2F

square

#1C51AB #AB1C99 #AB761C #1CAB2F

split-complementary

#1C51AB #AB2F1C #99AB1C

monochromatic

#0B1F42 #133876 #1C51AB #286BDC #5D8FE4

Accessibility & contrast

On white

7.46

#1C51AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1C51AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C51AB

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C51AB	#FFFFFF	#000000	##FFFFFF
##1C51AB	1.00	7.46	2.81	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F5CAE

Deuteranopia (green-blind)

#004FA9

Tritanopia (blue-blind)

#006776

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1c51ab;
/* rgb */ color: rgb(28, 81, 171);
/* oklch */ color: oklch(45.5% 0.155 260.4);

Tailwind

colors: {
  custom: {
    50: '#7281c5',
    500: '#1c51ab',
    950: '#000000',
  },
}

SCSS

$custom: #1c51ab;
$custom-light: #7281c5;
$custom-dark: #000000;

JSON

{
  "hex": "#1c51ab",
  "rgb": {
    "r": 28,
    "g": 81,
    "b": 171
  },
  "hsl": {
    "h": 217.762,
    "s": 71.859,
    "l": 39.02
  },
  "oklch": {
    "l": 0.45507,
    "c": 0.15503,
    "h": 260.4
  },
  "luminance": 0.09072
}

Semantic roles & 50–950 ramp

primary

#1C51AB

secondary

#C9A05A

accent

#AB39EF

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1C51AB

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

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