#237CB1#237CB1

#237CB1 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 56.0% C 0.115 H 240.4°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#237CB1
RGB	rgb(35, 124, 177)
HSL	hsl(202, 67%, 42%)
HSV	hsv(202, 80%, 69%)
CMYK	cmyk(80.2%, 29.9%, 0%, 30.6%)
CIE-LAB	lab(49.43, -6.91, -35.30)
CIE-LCH	lch(49.43, 35.96, 258.93°)
OKLab	oklab(56.05% -0.0569 -0.1)
OKLCH	oklch(56.05% 0.115 240.4)
XYZ	xyz(15.8335, 17.9450, 44.2157)
Luminance	0.1795 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#237CB1 #B15823

analogous

#23B19F #237CB1 #2335B1

triadic

#237CB1 #B1237C #7CB123

tetradic

#237CB1 #9F23B1 #B15823 #35B123

square

#237CB1 #9F23B1 #B15823 #35B123

split-complementary

#237CB1 #B12335 #B19F23

monochromatic

#0F344B #19587E #237CB1 #399DD8 #6CB6E2

Accessibility & contrast

On white

4.58

#237CB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#237CB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #237CB1

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##237CB1	#FFFFFF	#000000	##000000
##237CB1	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637DB3

Deuteranopia (green-blind)

#5070B0

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #237cb1;
/* rgb */ color: rgb(35, 124, 177);
/* oklch */ color: oklch(56.0% 0.115 240.4);

Tailwind

colors: {
  custom: {
    50: '#75a1c8',
    500: '#237cb1',
    950: '#000000',
  },
}

SCSS

$custom: #237cb1;
$custom-light: #75a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#237cb1",
  "rgb": {
    "r": 35,
    "g": 124,
    "b": 177
  },
  "hsl": {
    "h": 202.394,
    "s": 66.981,
    "l": 41.569
  },
  "oklch": {
    "l": 0.56045,
    "c": 0.11504,
    "h": 240.4
  },
  "luminance": 0.17947
}

Semantic roles & 50–950 ramp

primary

#237CB1

secondary

#C88C68

accent

#7E3EEA

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #237CB1

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

Preview Lab → · Contrast checker → · Palette generator →