#257DB0#257DB0

#257DB0 is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.3% C 0.113 H 239.4°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX#257DB0
RGBrgb(37, 125, 176)
HSLhsl(202, 65%, 42%)
HSVhsv(202, 79%, 69%)
CMYKcmyk(79%, 29%, 0%, 31%)
CIE-LABlab(49.73, -7.64, -34.24)
CIE-LCHlch(49.73, 35.09, 257.42°)
OKLaboklab(56.28% -0.0573 -0.0969)
OKLCHoklch(56.28% 0.113 239.4)
XYZxyz(15.9299, 18.1932, 43.7379)
Luminance0.1820 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#257DB0 #B05825
analogous
#25B09E #257DB0 #2538B0
triadic
#257DB0 #B0257D #7DB025
tetradic
#257DB0 #9E25B0 #B05825 #38B025
square
#257DB0 #9E25B0 #B05825 #38B025
split-complementary
#257DB0 #B02538 #B09E25
monochromatic
#10354B #1A597D #257DB0 #3C9ED6 #6FB7E1

Accessibility & contrast

On white

4.53
#257DB0 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.64
#257DB0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257DB0
4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##257DB0#FFFFFF#000000##000000
##257DB01.004.534.644.64
#FFFFFF4.531.0021.0021.00
#0000004.6421.001.001.00
##0000004.6421.001.001.00

Color blindness preview

Protanopia (red-blind)
#657DB2
Deuteranopia (green-blind)
#5271AF
Tritanopia (blue-blind)
#008A8F
Achromatopsia (no color)
#767676

Design tokens & code

CSS
--color: #257db0;
/* rgb */ color: rgb(37, 125, 176);
/* oklch */ color: oklch(56.3% 0.113 239.4);
Tailwind
colors: {
  custom: {
    50: '#75a2c8',
    500: '#257db0',
    950: '#000000',
  },
}
SCSS
$custom: #257db0;
$custom-light: #75a2c8;
$custom-dark: #000000;
JSON
{
  "hex": "#257db0",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 176
  },
  "hsl": {
    "h": 202.014,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.5628,
    "c": 0.11256,
    "h": 239.4
  },
  "luminance": 0.18195
}

Semantic roles & 50–950 ramp

primary
#257DB0
secondary
#C78C6A
accent
#7D40E8
background
#F7F9FC
surface
#EEF2F8
border
#C9CCD1
text
#0A0F13
muted
#7C7E82

Preview Lab

Preview with #257DB0

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

Preview Lab → · Contrast checker → · Palette generator →

#257DB0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva