#1C57B4#1C57B4

#1C57B4 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.5% C 0.160 H 259.6°. Best body text is #FFFFFF at 6.84:1 contrast (WCAG AA passes).

Color values

HEX	#1C57B4
RGB	rgb(28, 87, 180)
HSL	hsl(217, 73%, 41%)
HSV	hsv(217, 84%, 71%)
CMYK	cmyk(84.4%, 51.7%, 0%, 29.4%)
CIE-LAB	lab(38.48, 16.87, -54.53)
CIE-LCH	lch(38.48, 57.08, 287.19°)
OKLab	oklab(47.51% -0.0288 -0.1572)
OKLCH	oklch(47.51% 0.16 259.6)
XYZ	xyz(12.1223, 10.3570, 44.5314)
Luminance	0.1036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C57B4 #B4791C

analogous

#1CA3B4 #1C57B4 #2D1CB4

triadic

#1C57B4 #B41C57 #57B41C

tetradic

#1C57B4 #B41CA3 #B4791C #1CB42D

square

#1C57B4 #B41CA3 #B4791C #1CB42D

split-complementary

#1C57B4 #B42D1C #A3B41C

monochromatic

#0C244A #143D7F #1C57B4 #2F73DF #6497E7

Accessibility & contrast

On white

6.84

#1C57B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#1C57B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C57B4

6.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C57B4	#FFFFFF	#000000	##FFFFFF
##1C57B4	1.00	6.84	3.07	6.84
#FFFFFF	6.84	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1762B7

Deuteranopia (green-blind)

#0054B2

Tritanopia (blue-blind)

#006E7D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1c57b4;
/* rgb */ color: rgb(28, 87, 180);
/* oklch */ color: oklch(47.5% 0.160 259.6);

Tailwind

colors: {
  custom: {
    50: '#7485cb',
    500: '#1c57b4',
    950: '#000000',
  },
}

SCSS

$custom: #1c57b4;
$custom-light: #7485cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c57b4",
  "rgb": {
    "r": 28,
    "g": 87,
    "b": 180
  },
  "hsl": {
    "h": 216.711,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.47512,
    "c": 0.15981,
    "h": 259.6
  },
  "luminance": 0.10359
}

Semantic roles & 50–950 ramp

primary

#1C57B4

secondary

#CCA260

accent

#A838F0

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1C57B4

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

Preview Lab → · Contrast checker → · Palette generator →