#255EA3#255EA3

#255EA3 is a mid, vivid cyan. Relative luminance 0.110; OKLCH L 48.1% C 0.126 H 255.2°. Best body text is #FFFFFF at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#255EA3
RGB	rgb(37, 94, 163)
HSL	hsl(213, 63%, 39%)
HSV	hsv(213, 77%, 64%)
CMYK	cmyk(77.3%, 42.3%, 0%, 36.1%)
CIE-LAB	lab(39.65, 6.52, -42.57)
CIE-LCH	lch(39.65, 43.07, 278.71°)
OKLab	oklab(48.13% -0.0322 -0.1217)
OKLCH	oklch(48.13% 0.126 255.2)
XYZ	xyz(11.3741, 11.0417, 36.1750)
Luminance	0.1104 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255EA3 #A36A25

analogous

#259DA3 #255EA3 #2B25A3

triadic

#255EA3 #A3255E #5EA325

tetradic

#255EA3 #A3259D #A36A25 #25A32B

square

#255EA3 #A3259D #A36A25 #25A32B

split-complementary

#255EA3 #A32B25 #9DA325

monochromatic

#0E243F #1A4171 #255EA3 #347BD1 #669CDC

Accessibility & contrast

On white

6.54

#255EA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#255EA3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255EA3

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255EA3	#FFFFFF	#000000	##FFFFFF
##255EA3	1.00	6.54	3.21	6.54
#FFFFFF	6.54	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C64A6

Deuteranopia (green-blind)

#2658A2

Tritanopia (blue-blind)

#006E78

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #255ea3;
/* rgb */ color: rgb(37, 94, 163);
/* oklch */ color: oklch(48.1% 0.126 255.2);

Tailwind

colors: {
  custom: {
    50: '#728bbf',
    500: '#255ea3',
    950: '#000000',
  },
}

SCSS

$custom: #255ea3;
$custom-light: #728bbf;
$custom-dark: #000000;

JSON

{
  "hex": "#255ea3",
  "rgb": {
    "r": 37,
    "g": 94,
    "b": 163
  },
  "hsl": {
    "h": 212.857,
    "s": 63,
    "l": 39.216
  },
  "oklch": {
    "l": 0.48131,
    "c": 0.12595,
    "h": 255.2
  },
  "luminance": 0.11043
}

Semantic roles & 50–950 ramp

primary

#255EA3

secondary

#C29662

accent

#9C42E6

background

#F7F8FB

surface

#EDF0F7

border

#C8CBD0

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #255EA3

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

Preview Lab → · Contrast checker → · Palette generator →