#257DB1#257DB1

#257DB1 is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.3% C 0.114 H 239.9°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#257DB1
RGB	rgb(37, 125, 177)
HSL	hsl(202, 65%, 42%)
HSV	hsv(202, 79%, 69%)
CMYK	cmyk(79.1%, 29.4%, 0%, 30.6%)
CIE-LAB	lab(49.78, -7.28, -34.75)
CIE-LCH	lch(49.78, 35.50, 258.17°)
OKLab	oklab(56.33% -0.0569 -0.0984)
OKLCH	oklch(56.33% 0.114 239.9)
XYZ	xyz(16.0292, 18.2329, 44.2609)
Luminance	0.1824 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257DB1 #B15925

analogous

#25B19F #257DB1 #2537B1

triadic

#257DB1 #B1257D #7DB125

tetradic

#257DB1 #9F25B1 #B15925 #37B125

square

#257DB1 #9F25B1 #B15925 #37B125

split-complementary

#257DB1 #B12537 #B19F25

monochromatic

#10364C #1A597E #257DB1 #3D9DD6 #6FB7E1

Accessibility & contrast

On white

4.52

#257DB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#257DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257DB1

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257DB1	#FFFFFF	#000000	##000000
##257DB1	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647EB3

Deuteranopia (green-blind)

#5171B0

Tritanopia (blue-blind)

#008A8F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #257db1;
/* rgb */ color: rgb(37, 125, 177);
/* oklch */ color: oklch(56.3% 0.114 239.9);

Tailwind

colors: {
  custom: {
    50: '#75a2c8',
    500: '#257db1',
    950: '#000000',
  },
}

SCSS

$custom: #257db1;
$custom-light: #75a2c8;
$custom-dark: #000000;

JSON

{
  "hex": "#257db1",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 177
  },
  "hsl": {
    "h": 202.286,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.56334,
    "c": 0.11366,
    "h": 239.9
  },
  "luminance": 0.18235
}

Semantic roles & 50–950 ramp

primary

#257DB1

secondary

#C88D6A

accent

#7E3FE8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #257DB1

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

Preview Lab → · Contrast checker → · Palette generator →