#258BB4#258BB4

#258BB4 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 59.9% C 0.108 H 230.3°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#258BB4
RGB	rgb(37, 139, 180)
HSL	hsl(197, 66%, 43%)
HSV	hsv(197, 79%, 71%)
CMYK	cmyk(79.4%, 22.8%, 0%, 29.4%)
CIE-LAB	lab(54.19, -14.18, -29.58)
CIE-LCH	lch(54.19, 32.81, 244.39°)
OKLab	oklab(59.89% -0.0692 -0.0833)
OKLCH	oklch(59.89% 0.108 230.3)
XYZ	xyz(18.2304, 22.1516, 46.4860)
Luminance	0.2215 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#258BB4 #B44E25

analogous

#25B496 #258BB4 #2543B4

triadic

#258BB4 #B4258B #8BB425

tetradic

#258BB4 #9625B4 #B44E25 #43B425

square

#258BB4 #9625B4 #B44E25 #43B425

split-complementary

#258BB4 #B42543 #B49625

monochromatic

#103D4E #1B6481 #258BB4 #3FACD7 #71C2E2

Accessibility & contrast

On white

3.87

#258BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#258BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #258BB4

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##258BB4	#FFFFFF	#000000	##000000
##258BB4	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B6

Deuteranopia (green-blind)

#637CB3

Tritanopia (blue-blind)

#009699

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #258bb4;
/* rgb */ color: rgb(37, 139, 180);
/* oklch */ color: oklch(59.9% 0.108 230.3);

Tailwind

colors: {
  custom: {
    50: '#77acca',
    500: '#258bb4',
    950: '#000000',
  },
}

SCSS

$custom: #258bb4;
$custom-light: #77acca;
$custom-dark: #000000;

JSON

{
  "hex": "#258bb4",
  "rgb": {
    "r": 37,
    "g": 139,
    "b": 180
  },
  "hsl": {
    "h": 197.203,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.5989,
    "c": 0.10826,
    "h": 230.3
  },
  "luminance": 0.22154
}

Semantic roles & 50–950 ramp

primary

#258BB4

secondary

#C9876C

accent

#703FE9

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #258BB4

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

Preview Lab → · Contrast checker → · Palette generator →