#1C31B4#1C31B4

#1C31B4 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.3% C 0.204 H 267.4°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#1C31B4
RGB	rgb(28, 49, 180)
HSL	hsl(232, 73%, 41%)
HSV	hsv(232, 84%, 71%)
CMYK	cmyk(84.4%, 72.8%, 0%, 29.4%)
CIE-LAB	lab(28.74, 41.71, -70.46)
CIE-LCH	lch(28.74, 81.88, 300.63°)
OKLab	oklab(40.27% -0.0092 -0.2042)
OKLCH	oklch(40.27% 0.204 267.4)
XYZ	xyz(9.8126, 5.7376, 43.7615)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.88

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C31B4 #B49F1C

analogous

#1C7DB4 #1C31B4 #531CB4

triadic

#1C31B4 #B41C31 #31B41C

tetradic

#1C31B4 #B41C7D #B49F1C #1CB453

square

#1C31B4 #B41C7D #B49F1C #1CB453

split-complementary

#1C31B4 #B4531C #7DB41C

monochromatic

#0C144A #14237F #1C31B4 #2F47DF #6476E7

Accessibility & contrast

On white

9.78

#1C31B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1C31B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C31B4

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C31B4	#FFFFFF	#000000	##FFFFFF
##1C31B4	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB8

Deuteranopia (green-blind)

#003CB2

Tritanopia (blue-blind)

#00576F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1c31b4;
/* rgb */ color: rgb(28, 49, 180);
/* oklch */ color: oklch(40.3% 0.204 267.4);

Tailwind

colors: {
  custom: {
    50: '#776acc',
    500: '#1c31b4',
    950: '#000000',
  },
}

SCSS

$custom: #1c31b4;
$custom-light: #776acc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c31b4",
  "rgb": {
    "r": 28,
    "g": 49,
    "b": 180
  },
  "hsl": {
    "h": 231.711,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.40274,
    "c": 0.20446,
    "h": 267.4
  },
  "luminance": 0.05739
}

Semantic roles & 50–950 ramp

primary

#1C31B4

secondary

#CCBD60

accent

#D638F0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #1C31B4

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

Preview Lab → · Contrast checker → · Palette generator →