#257CB1#257CB1

#257CB1 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.1% C 0.114 H 240.7°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#257CB1
RGB	rgb(37, 124, 177)
HSL	hsl(203, 65%, 42%)
HSV	hsv(203, 79%, 69%)
CMYK	cmyk(79.1%, 29.9%, 0%, 30.6%)
CIE-LAB	lab(49.47, -6.69, -35.22)
CIE-LCH	lch(49.47, 35.85, 259.24°)
OKLab	oklab(56.09% -0.056 -0.0998)
OKLCH	oklch(56.09% 0.114 240.7)
XYZ	xyz(15.9033, 17.9810, 44.2190)
Luminance	0.1798 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257CB1 #B15A25

analogous

#25B1A0 #257CB1 #2536B1

triadic

#257CB1 #B1257C #7CB125

tetradic

#257CB1 #A025B1 #B15A25 #36B125

square

#257CB1 #A025B1 #B15A25 #36B125

split-complementary

#257CB1 #B12536 #B1A025

monochromatic

#10354C #1A597E #257CB1 #3D9CD6 #6FB6E1

Accessibility & contrast

On white

4.57

#257CB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#257CB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257CB1

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257CB1	#FFFFFF	#000000	##000000
##257CB1	1.00	4.57	4.60	4.60
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637DB3

Deuteranopia (green-blind)

#5070B0

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #257cb1;
/* rgb */ color: rgb(37, 124, 177);
/* oklch */ color: oklch(56.1% 0.114 240.7);

Tailwind

colors: {
  custom: {
    50: '#75a1c8',
    500: '#257cb1',
    950: '#000000',
  },
}

SCSS

$custom: #257cb1;
$custom-light: #75a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#257cb1",
  "rgb": {
    "r": 37,
    "g": 124,
    "b": 177
  },
  "hsl": {
    "h": 202.714,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.56092,
    "c": 0.11442,
    "h": 240.7
  },
  "luminance": 0.17983
}

Semantic roles & 50–950 ramp

primary

#257CB1

secondary

#C88E6A

accent

#7F3FE8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #257CB1

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

Preview Lab → · Contrast checker → · Palette generator →