#257BB0#257BB0

#257BB0 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.8% C 0.114 H 240.9°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#257BB0
RGB	rgb(37, 123, 176)
HSL	hsl(203, 65%, 42%)
HSV	hsv(203, 79%, 69%)
CMYK	cmyk(79%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.12, -6.47, -35.20)
CIE-LCH	lch(49.12, 35.79, 259.58°)
OKLab	oklab(55.8% -0.0554 -0.0997)
OKLCH	oklch(55.8% 0.114 240.9)
XYZ	xyz(15.6793, 17.6919, 43.6544)
Luminance	0.1769 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257BB0 #B05A25

analogous

#25B0A0 #257BB0 #2535B0

triadic

#257BB0 #B0257B #7BB025

tetradic

#257BB0 #A025B0 #B05A25 #35B025

square

#257BB0 #A025B0 #B05A25 #35B025

split-complementary

#257BB0 #B02535 #B0A025

monochromatic

#10344B #1A587D #257BB0 #3C9BD6 #6FB5E1

Accessibility & contrast

On white

4.63

#257BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#257BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257BB0

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257BB0	#FFFFFF	#000000	##FFFFFF
##257BB0	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB2

Deuteranopia (green-blind)

#4F6FAF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257bb0;
/* rgb */ color: rgb(37, 123, 176);
/* oklch */ color: oklch(55.8% 0.114 240.9);

Tailwind

colors: {
  custom: {
    50: '#75a1c8',
    500: '#257bb0',
    950: '#000000',
  },
}

SCSS

$custom: #257bb0;
$custom-light: #75a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#257bb0",
  "rgb": {
    "r": 37,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 202.878,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.55797,
    "c": 0.11406,
    "h": 240.9
  },
  "luminance": 0.17694
}

Semantic roles & 50–950 ramp

primary

#257BB0

secondary

#C78D6A

accent

#8040E8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #257BB0

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

Preview Lab → · Contrast checker → · Palette generator →