#257BB2#257BB2

#257BB2 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 55.9% C 0.116 H 241.9°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#257BB2
RGB	rgb(37, 123, 178)
HSL	hsl(203, 66%, 42%)
HSV	hsv(203, 79%, 70%)
CMYK	cmyk(79.2%, 30.9%, 0%, 30.2%)
CIE-LAB	lab(49.22, -5.74, -36.20)
CIE-LCH	lch(49.22, 36.65, 261.00°)
OKLab	oklab(55.91% -0.0548 -0.1026)
OKLCH	oklch(55.91% 0.116 241.9)
XYZ	xyz(15.8786, 17.7717, 44.7042)
Luminance	0.1777 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257BB2 #B25C25

analogous

#25B2A2 #257BB2 #2535B2

triadic

#257BB2 #B2257B #7BB225

tetradic

#257BB2 #A225B2 #B25C25 #35B225

square

#257BB2 #A225B2 #B25C25 #35B225

split-complementary

#257BB2 #B22535 #B2A225

monochromatic

#10354D #1A587F #257BB2 #3D9BD7 #70B5E1

Accessibility & contrast

On white

4.61

#257BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#257BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257BB2

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257BB2	#FFFFFF	#000000	##FFFFFF
##257BB2	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#617CB4

Deuteranopia (green-blind)

#4E6FB1

Tritanopia (blue-blind)

#00898E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257bb2;
/* rgb */ color: rgb(37, 123, 178);
/* oklch */ color: oklch(55.9% 0.116 241.9);

Tailwind

colors: {
  custom: {
    50: '#76a1c9',
    500: '#257bb2',
    950: '#000000',
  },
}

SCSS

$custom: #257bb2;
$custom-light: #76a1c9;
$custom-dark: #000000;

JSON

{
  "hex": "#257bb2",
  "rgb": {
    "r": 37,
    "g": 123,
    "b": 178
  },
  "hsl": {
    "h": 203.404,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.55906,
    "c": 0.11633,
    "h": 241.9
  },
  "luminance": 0.17774
}

Semantic roles & 50–950 ramp

primary

#257BB2

secondary

#C88F6B

accent

#813FE9

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #257BB2

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

Preview Lab → · Contrast checker → · Palette generator →