#257BC4#257BC4

#257BC4 is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 56.9% C 0.138 H 248.9°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#257BC4
RGB	rgb(37, 123, 196)
HSL	hsl(208, 68%, 46%)
HSV	hsv(208, 81%, 77%)
CMYK	cmyk(81.1%, 37.2%, 0%, 23.1%)
CIE-LAB	lab(50.15, 0.98, -45.09)
CIE-LCH	lch(50.15, 45.10, 271.24°)
OKLab	oklab(56.94% -0.0496 -0.1286)
OKLCH	oklch(56.94% 0.138 248.9)
XYZ	xyz(17.8059, 18.5426, 54.8545)
Luminance	0.1855 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257BC4 #C46E25

analogous

#25C4BD #257BC4 #252CC4

triadic

#257BC4 #C4257B #7BC425

tetradic

#257BC4 #BD25C4 #C46E25 #2CC425

square

#257BC4 #BD25C4 #C46E25 #2CC425

split-complementary

#257BC4 #C4252C #C4BD25

monochromatic

#123A5D #1B5B91 #257BC4 #4999DD #7DB6E6

Accessibility & contrast

On white

4.46

#257BC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#257BC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257BC4

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257BC4	#FFFFFF	#000000	##000000
##257BC4	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#587FC7

Deuteranopia (green-blind)

#4071C3

Tritanopia (blue-blind)

#008D96

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #257bc4;
/* rgb */ color: rgb(37, 123, 196);
/* oklch */ color: oklch(56.9% 0.138 248.9);

Tailwind

colors: {
  custom: {
    50: '#79a0d6',
    500: '#257bc4',
    950: '#000000',
  },
}

SCSS

$custom: #257bc4;
$custom-light: #79a0d6;
$custom-dark: #000000;

JSON

{
  "hex": "#257bc4",
  "rgb": {
    "r": 37,
    "g": 123,
    "b": 196
  },
  "hsl": {
    "h": 207.547,
    "s": 68.24,
    "l": 45.686
  },
  "oklch": {
    "l": 0.56943,
    "c": 0.13785,
    "h": 248.9
  },
  "luminance": 0.18545
}

Semantic roles & 50–950 ramp

primary

#257BC4

secondary

#CF9F76

accent

#8D3DEB

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0E14

muted

#7C7E83

Preview Lab

Preview with #257BC4

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

Preview Lab → · Contrast checker → · Palette generator →