#1C57B3#1C57B3

#1C57B3 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.4% C 0.158 H 259.5°. Best body text is #FFFFFF at 6.85:1 contrast (WCAG AA passes).

Color values

HEX	#1C57B3
RGB	rgb(28, 87, 179)
HSL	hsl(217, 73%, 41%)
HSV	hsv(217, 84%, 70%)
CMYK	cmyk(84.4%, 51.4%, 0%, 29.8%)
CIE-LAB	lab(38.40, 16.48, -54.06)
CIE-LCH	lch(38.40, 56.51, 286.95°)
OKLab	oklab(47.44% -0.0289 -0.1558)
OKLCH	oklch(47.44% 0.158 259.5)
XYZ	xyz(12.0208, 10.3164, 43.9968)
Luminance	0.1032 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C57B3 #B3781C

analogous

#1CA2B3 #1C57B3 #2C1CB3

triadic

#1C57B3 #B31C57 #57B31C

tetradic

#1C57B3 #B31CA2 #B3781C #1CB32C

square

#1C57B3 #B31CA2 #B3781C #1CB32C

split-complementary

#1C57B3 #B32C1C #A2B31C

monochromatic

#0B2449 #143D7E #1C57B3 #2E73DE #6396E7

Accessibility & contrast

On white

6.85

#1C57B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#1C57B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C57B3

6.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C57B3	#FFFFFF	#000000	##FFFFFF
##1C57B3	1.00	6.85	3.06	6.85
#FFFFFF	6.85	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1962B6

Deuteranopia (green-blind)

#0054B1

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #1c57b3;
/* rgb */ color: rgb(28, 87, 179);
/* oklch */ color: oklch(47.4% 0.158 259.5);

Tailwind

colors: {
  custom: {
    50: '#7485ca',
    500: '#1c57b3',
    950: '#000000',
  },
}

SCSS

$custom: #1c57b3;
$custom-light: #7485ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1c57b3",
  "rgb": {
    "r": 28,
    "g": 87,
    "b": 179
  },
  "hsl": {
    "h": 216.556,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.47435,
    "c": 0.15846,
    "h": 259.5
  },
  "luminance": 0.10318
}

Semantic roles & 50–950 ramp

primary

#1C57B3

secondary

#CBA15F

accent

#A838F0

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1C57B3

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

Preview Lab → · Contrast checker → · Palette generator →