#257DC4#257DC4

#257DC4 is a mid, vivid cyan. Relative luminance 0.190; OKLCH L 57.4% C 0.136 H 247.8°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#257DC4
RGB	rgb(37, 125, 196)
HSL	hsl(207, 68%, 46%)
HSV	hsv(207, 81%, 77%)
CMYK	cmyk(81.1%, 36.2%, 0%, 23.1%)
CIE-LAB	lab(50.74, -0.23, -44.16)
CIE-LCH	lch(50.74, 44.16, 269.70°)
OKLab	oklab(57.41% -0.0513 -0.1258)
OKLCH	oklch(57.41% 0.136 247.8)
XYZ	xyz(18.0565, 19.0438, 54.9380)
Luminance	0.1905 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257DC4 #C46C25

analogous

#25C4BB #257DC4 #252EC4

triadic

#257DC4 #C4257D #7DC425

tetradic

#257DC4 #BB25C4 #C46C25 #2EC425

square

#257DC4 #BB25C4 #C46C25 #2EC425

split-complementary

#257DC4 #C4252E #C4BB25

monochromatic

#123B5D #1B5C91 #257DC4 #499BDD #7DB7E6

Accessibility & contrast

On white

4.37

#257DC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#257DC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257DC4

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257DC4	#FFFFFF	#000000	##000000
##257DC4	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B81C7

Deuteranopia (green-blind)

#4472C3

Tritanopia (blue-blind)

#008E97

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #257dc4;
/* rgb */ color: rgb(37, 125, 196);
/* oklch */ color: oklch(57.4% 0.136 247.8);

Tailwind

colors: {
  custom: {
    50: '#79a2d6',
    500: '#257dc4',
    950: '#000000',
  },
}

SCSS

$custom: #257dc4;
$custom-light: #79a2d6;
$custom-dark: #000000;

JSON

{
  "hex": "#257dc4",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 196
  },
  "hsl": {
    "h": 206.792,
    "s": 68.24,
    "l": 45.686
  },
  "oklch": {
    "l": 0.57407,
    "c": 0.13589,
    "h": 247.8
  },
  "luminance": 0.19046
}

Semantic roles & 50–950 ramp

primary

#257DC4

secondary

#CF9E76

accent

#8B3DEB

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0F14

muted

#7C7E83

Preview Lab

Preview with #257DC4

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

Preview Lab → · Contrast checker → · Palette generator →