#237DA8#237DA8

#237DA8 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 55.8% C 0.105 H 234.5°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#237DA8
RGB	rgb(35, 125, 168)
HSL	hsl(199, 66%, 40%)
HSV	hsv(199, 79%, 66%)
CMYK	cmyk(79.2%, 25.6%, 0%, 34.1%)
CIE-LAB	lab(49.31, -10.77, -30.26)
CIE-LCH	lch(49.31, 32.12, 250.40°)
OKLab	oklab(55.81% -0.0609 -0.0853)
OKLCH	oklch(55.81% 0.105 234.5)
XYZ	xyz(15.0918, 17.8499, 39.6882)
Luminance	0.1785 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#237DA8 #A84E23

analogous

#23A890 #237DA8 #233BA8

triadic

#237DA8 #A8237D #7DA823

tetradic

#237DA8 #9023A8 #A84E23 #3BA823

square

#237DA8 #9023A8 #A84E23 #3BA823

split-complementary

#237DA8 #A8233B #A89023

monochromatic

#0E3243 #185775 #237DA8 #34A1D5 #66B8DF

Accessibility & contrast

On white

4.59

#237DA8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#237DA8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #237DA8

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##237DA8	#FFFFFF	#000000	##FFFFFF
##237DA8	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#687CAA

Deuteranopia (green-blind)

#5670A7

Tritanopia (blue-blind)

#00888C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #237da8;
/* rgb */ color: rgb(35, 125, 168);
/* oklch */ color: oklch(55.8% 0.105 234.5);

Tailwind

colors: {
  custom: {
    50: '#73a2c2',
    500: '#237da8',
    950: '#000000',
  },
}

SCSS

$custom: #237da8;
$custom-light: #73a2c2;
$custom-dark: #000000;

JSON

{
  "hex": "#237da8",
  "rgb": {
    "r": 35,
    "g": 125,
    "b": 168
  },
  "hsl": {
    "h": 199.398,
    "s": 65.517,
    "l": 39.804
  },
  "oklch": {
    "l": 0.55814,
    "c": 0.10484,
    "h": 234.5
  },
  "luminance": 0.17852
}

Semantic roles & 50–950 ramp

primary

#237DA8

secondary

#C58262

accent

#763FE8

background

#F7F9FB

surface

#EEF2F7

border

#C9CCD0

text

#090F12

muted

#7B7E81

Preview Lab

Preview with #237DA8

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

Preview Lab → · Contrast checker → · Palette generator →