#257BBC#257BBC

#257BBC is a mid, vivid cyan. Relative luminance 0.182; OKLCH L 56.5% C 0.128 H 246.2°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#257BBC
RGB	rgb(37, 123, 188)
HSL	hsl(206, 67%, 44%)
HSV	hsv(206, 80%, 74%)
CMYK	cmyk(80.3%, 34.6%, 0%, 26.3%)
CIE-LAB	lab(49.72, -2.02, -41.18)
CIE-LCH	lch(49.72, 41.23, 267.19°)
OKLab	oklab(56.47% -0.0518 -0.1171)
OKLCH	oklch(56.47% 0.128 246.2)
XYZ	xyz(16.9195, 18.1880, 50.1861)
Luminance	0.1819 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257BBC #BC6625

analogous

#25BCB2 #257BBC #2530BC

triadic

#257BBC #BC257B #7BBC25

tetradic

#257BBC #B225BC #BC6625 #30BC25

square

#257BBC #B225BC #BC6625 #30BC25

split-complementary

#257BBC #BC2530 #BCB225

monochromatic

#113856 #1B5A89 #257BBC #449ADA #77B5E4

Accessibility & contrast

On white

4.53

#257BBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#257BBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257BBC

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257BBC	#FFFFFF	#000000	##000000
##257BBC	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7EBF

Deuteranopia (green-blind)

#4770BB

Tritanopia (blue-blind)

#008B93

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #257bbc;
/* rgb */ color: rgb(37, 123, 188);
/* oklch */ color: oklch(56.5% 0.128 246.2);

Tailwind

colors: {
  custom: {
    50: '#78a0d0',
    500: '#257bbc',
    950: '#000000',
  },
}

SCSS

$custom: #257bbc;
$custom-light: #78a0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#257bbc",
  "rgb": {
    "r": 37,
    "g": 123,
    "b": 188
  },
  "hsl": {
    "h": 205.828,
    "s": 67.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.56471,
    "c": 0.12808,
    "h": 246.2
  },
  "luminance": 0.1819
}

Semantic roles & 50–950 ramp

primary

#257BBC

secondary

#CC9871

accent

#883EEA

background

#F7F9FC

surface

#EEF2F9

border

#C9CCD2

text

#0A0E14

muted

#7C7E82

Preview Lab

Preview with #257BBC

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

Preview Lab → · Contrast checker → · Palette generator →