#257AB0#257AB0

#257AB0 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.6% C 0.115 H 241.7°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX#257AB0
RGBrgb(37, 122, 176)
HSLhsl(203, 65%, 42%)
HSVhsv(203, 79%, 69%)
CMYKcmyk(79%, 30.7%, 0%, 31%)
CIE-LABlab(48.82, -5.88, -35.68)
CIE-LCHlch(48.82, 36.16, 260.64°)
OKLaboklab(55.56% -0.0544 -0.1011)
OKLCHoklch(55.56% 0.115 241.7)
XYZxyz(15.5559, 17.4451, 43.6133)
Luminance0.1745 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#257AB0 #B05B25
analogous
#25B0A1 #257AB0 #2535B0
triadic
#257AB0 #B0257A #7AB025
tetradic
#257AB0 #A125B0 #B05B25 #35B025
square
#257AB0 #A125B0 #B05B25 #35B025
split-complementary
#257AB0 #B02535 #B0A125
monochromatic
#10344B #1A577D #257AB0 #3C9AD6 #6FB4E1

Accessibility & contrast

On white

4.68
#257AB0 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.49
#257AB0 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #257AB0
4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##257AB0#FFFFFF#000000##FFFFFF
##257AB01.004.684.494.68
#FFFFFF4.681.0021.001.00
#0000004.4921.001.0021.00
##FFFFFF4.681.0021.001.00

Color blindness preview

Protanopia (red-blind)
#617BB2
Deuteranopia (green-blind)
#4E6EAF
Tritanopia (blue-blind)
#00878D
Achromatopsia (no color)
#747474

Design tokens & code

CSS
--color: #257ab0;
/* rgb */ color: rgb(37, 122, 176);
/* oklch */ color: oklch(55.6% 0.115 241.7);
Tailwind
colors: {
  custom: {
    50: '#75a0c8',
    500: '#257ab0',
    950: '#000000',
  },
}
SCSS
$custom: #257ab0;
$custom-light: #75a0c8;
$custom-dark: #000000;
JSON
{
  "hex": "#257ab0",
  "rgb": {
    "r": 37,
    "g": 122,
    "b": 176
  },
  "hsl": {
    "h": 203.309,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.55556,
    "c": 0.11484,
    "h": 241.7
  },
  "luminance": 0.17447
}

Semantic roles & 50–950 ramp

primary
#257AB0
secondary
#C78E6A
accent
#8140E8
background
#F7F9FC
surface
#EEF2F8
border
#C9CCD1
text
#0A0E13
muted
#7C7E82

Preview Lab

Preview with #257AB0

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

Preview Lab → · Contrast checker → · Palette generator →

#257AB0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva