#257BB1#257BB1

#257BB1 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.9% C 0.115 H 241.4°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#257BB1
RGB	rgb(37, 123, 177)
HSL	hsl(203, 65%, 42%)
HSV	hsv(203, 79%, 69%)
CMYK	cmyk(79.1%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(49.17, -6.10, -35.70)
CIE-LCH	lch(49.17, 36.22, 260.30°)
OKLab	oklab(55.85% -0.0551 -0.1012)
OKLCH	oklch(55.85% 0.115 241.4)
XYZ	xyz(15.7786, 17.7316, 44.1774)
Luminance	0.1773 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257BB1 #B15B25

analogous

#25B1A1 #257BB1 #2535B1

triadic

#257BB1 #B1257B #7BB125

tetradic

#257BB1 #A125B1 #B15B25 #35B125

square

#257BB1 #A125B1 #B15B25 #35B125

split-complementary

#257BB1 #B12535 #B1A125

monochromatic

#10354C #1A587E #257BB1 #3D9BD6 #6FB5E1

Accessibility & contrast

On white

4.62

#257BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#257BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257BB1

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257BB1	#FFFFFF	#000000	##FFFFFF
##257BB1	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB3

Deuteranopia (green-blind)

#4E6FB0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257bb1;
/* rgb */ color: rgb(37, 123, 177);
/* oklch */ color: oklch(55.9% 0.115 241.4);

Tailwind

colors: {
  custom: {
    50: '#75a1c8',
    500: '#257bb1',
    950: '#000000',
  },
}

SCSS

$custom: #257bb1;
$custom-light: #75a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#257bb1",
  "rgb": {
    "r": 37,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 203.143,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.55852,
    "c": 0.11519,
    "h": 241.4
  },
  "luminance": 0.17734
}

Semantic roles & 50–950 ramp

primary

#257BB1

secondary

#C88E6A

accent

#813FE8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #257BB1

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

Preview Lab → · Contrast checker → · Palette generator →