#2591B4#2591B4

#2591B4 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.4% C 0.106 H 225.0°. Best body text is #000000 at 5.79:1 contrast (WCAG AA passes).

Color values

HEX	#2591B4
RGB	rgb(37, 145, 180)
HSL	hsl(195, 66%, 43%)
HSV	hsv(195, 79%, 71%)
CMYK	cmyk(79.4%, 19.4%, 0%, 29.4%)
CIE-LAB	lab(56.02, -17.47, -26.74)
CIE-LCH	lch(56.02, 31.94, 236.84°)
OKLab	oklab(61.36% -0.0749 -0.075)
OKLCH	oklch(61.36% 0.106 225)
XYZ	xyz(19.1231, 23.9370, 46.7836)
Luminance	0.2394 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2591B4 #B44825

analogous

#25B48F #2591B4 #254AB4

triadic

#2591B4 #B42591 #91B425

tetradic

#2591B4 #8F25B4 #B44825 #4AB425

square

#2591B4 #8F25B4 #B44825 #4AB425

split-complementary

#2591B4 #B4254A #B48F25

monochromatic

#103F4E #1B6881 #2591B4 #3FB2D7 #71C6E2

Accessibility & contrast

On white

3.63

#2591B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.79

#2591B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2591B4

5.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2591B4	#FFFFFF	#000000	##000000
##2591B4	1.00	3.63	5.79	5.79
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.79	21.00	1.00	1.00
##000000	5.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB6

Deuteranopia (green-blind)

#6B80B4

Tritanopia (blue-blind)

#009B9C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #2591b4;
/* rgb */ color: rgb(37, 145, 180);
/* oklch */ color: oklch(61.4% 0.106 225.0);

Tailwind

colors: {
  custom: {
    50: '#77b1ca',
    500: '#2591b4',
    950: '#000000',
  },
}

SCSS

$custom: #2591b4;
$custom-light: #77b1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2591b4",
  "rgb": {
    "r": 37,
    "g": 145,
    "b": 180
  },
  "hsl": {
    "h": 194.685,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.61361,
    "c": 0.10605,
    "h": 225
  },
  "luminance": 0.23939
}

Semantic roles & 50–950 ramp

primary

#2591B4

secondary

#C9836C

accent

#693FE9

background

#F7FAFC

surface

#EEF5F8

border

#C9CFD1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #2591B4

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

Preview Lab → · Contrast checker → · Palette generator →