#257DB2#257DB2

#257DB2 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.4% C 0.115 H 240.4°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#257DB2
RGB	rgb(37, 125, 178)
HSL	hsl(203, 66%, 42%)
HSV	hsv(203, 79%, 70%)
CMYK	cmyk(79.2%, 29.8%, 0%, 30.2%)
CIE-LAB	lab(49.83, -6.91, -35.25)
CIE-LCH	lch(49.83, 35.92, 258.91°)
OKLab	oklab(56.39% -0.0566 -0.0998)
OKLCH	oklch(56.39% 0.115 240.4)
XYZ	xyz(16.1293, 18.2729, 44.7878)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257DB2 #B25A25

analogous

#25B2A0 #257DB2 #2537B2

triadic

#257DB2 #B2257D #7DB225

tetradic

#257DB2 #A025B2 #B25A25 #37B225

square

#257DB2 #A025B2 #B25A25 #37B225

split-complementary

#257DB2 #B22537 #B2A025

monochromatic

#10364D #1A597F #257DB2 #3D9DD7 #70B7E1

Accessibility & contrast

On white

4.51

#257DB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#257DB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257DB2

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257DB2	#FFFFFF	#000000	##000000
##257DB2	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647EB4

Deuteranopia (green-blind)

#5171B1

Tritanopia (blue-blind)

#008A90

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #257db2;
/* rgb */ color: rgb(37, 125, 178);
/* oklch */ color: oklch(56.4% 0.115 240.4);

Tailwind

colors: {
  custom: {
    50: '#76a2c9',
    500: '#257db2',
    950: '#000000',
  },
}

SCSS

$custom: #257db2;
$custom-light: #76a2c9;
$custom-dark: #000000;

JSON

{
  "hex": "#257db2",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 178
  },
  "hsl": {
    "h": 202.553,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.56388,
    "c": 0.11477,
    "h": 240.4
  },
  "luminance": 0.18275
}

Semantic roles & 50–950 ramp

primary

#257DB2

secondary

#C88E6B

accent

#7F3FE9

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #257DB2

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

Preview Lab → · Contrast checker → · Palette generator →