#257AB1#257AB1

#257AB1 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.6% C 0.116 H 242.2°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#257AB1
RGB	rgb(37, 122, 177)
HSL	hsl(204, 65%, 42%)
HSV	hsv(204, 79%, 69%)
CMYK	cmyk(79.1%, 31.1%, 0%, 30.6%)
CIE-LAB	lab(48.87, -5.51, -36.18)
CIE-LCH	lch(48.87, 36.60, 261.34°)
OKLab	oklab(55.61% -0.0541 -0.1026)
OKLCH	oklch(55.61% 0.116 242.2)
XYZ	xyz(15.6552, 17.4848, 44.1363)
Luminance	0.1749 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257AB1 #B15C25

analogous

#25B1A2 #257AB1 #2534B1

triadic

#257AB1 #B1257A #7AB125

tetradic

#257AB1 #A225B1 #B15C25 #34B125

square

#257AB1 #A225B1 #B15C25 #34B125

split-complementary

#257AB1 #B12534 #B1A225

monochromatic

#10344C #1A577E #257AB1 #3D9AD6 #6FB4E1

Accessibility & contrast

On white

4.67

#257AB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#257AB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257AB1

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257AB1	#FFFFFF	#000000	##FFFFFF
##257AB1	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#607BB3

Deuteranopia (green-blind)

#4D6EB0

Tritanopia (blue-blind)

#00888D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #257ab1;
/* rgb */ color: rgb(37, 122, 177);
/* oklch */ color: oklch(55.6% 0.116 242.2);

Tailwind

colors: {
  custom: {
    50: '#75a0c8',
    500: '#257ab1',
    950: '#000000',
  },
}

SCSS

$custom: #257ab1;
$custom-light: #75a0c8;
$custom-dark: #000000;

JSON

{
  "hex": "#257ab1",
  "rgb": {
    "r": 37,
    "g": 122,
    "b": 177
  },
  "hsl": {
    "h": 203.571,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.55611,
    "c": 0.11599,
    "h": 242.2
  },
  "luminance": 0.17487
}

Semantic roles & 50–950 ramp

primary

#257AB1

secondary

#C88F6A

accent

#823FE8

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #257AB1

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

Preview Lab → · Contrast checker → · Palette generator →