#2591B2#2591B2

#2591B2 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.3% C 0.105 H 223.6°. Best body text is #000000 at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#2591B2
RGB	rgb(37, 145, 178)
HSL	hsl(194, 66%, 42%)
HSV	hsv(194, 79%, 70%)
CMYK	cmyk(79.2%, 18.5%, 0%, 30.2%)
CIE-LAB	lab(55.94, -18.15, -25.72)
CIE-LCH	lch(55.94, 31.48, 234.79°)
OKLab	oklab(61.27% -0.0757 -0.0721)
OKLCH	oklch(61.27% 0.105 223.6)
XYZ	xyz(18.9209, 23.8561, 45.7183)
Luminance	0.2386 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2591B2 #B24625

analogous

#25B28D #2591B2 #254AB2

triadic

#2591B2 #B22591 #91B225

tetradic

#2591B2 #8D25B2 #B24625 #4AB225

square

#2591B2 #8D25B2 #B24625 #4AB225

split-complementary

#2591B2 #B2254A #B28D25

monochromatic

#103E4D #1A687F #2591B2 #3DB3D7 #70C7E1

Accessibility & contrast

On white

3.64

#2591B2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.77

#2591B2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2591B2

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2591B2	#FFFFFF	#000000	##000000
##2591B2	1.00	3.64	5.77	5.77
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.77	21.00	1.00	1.00
##000000	5.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB4

Deuteranopia (green-blind)

#6C80B2

Tritanopia (blue-blind)

#009B9C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #2591b2;
/* rgb */ color: rgb(37, 145, 178);
/* oklch */ color: oklch(61.3% 0.105 223.6);

Tailwind

colors: {
  custom: {
    50: '#77b1c9',
    500: '#2591b2',
    950: '#000000',
  },
}

SCSS

$custom: #2591b2;
$custom-light: #77b1c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2591b2",
  "rgb": {
    "r": 37,
    "g": 145,
    "b": 178
  },
  "hsl": {
    "h": 194.043,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.61269,
    "c": 0.10457,
    "h": 223.6
  },
  "luminance": 0.23858
}

Semantic roles & 50–950 ramp

primary

#2591B2

secondary

#C8816B

accent

#673FE9

background

#F7FAFC

surface

#EEF5F8

border

#C9CFD1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #2591B2

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

Preview Lab → · Contrast checker → · Palette generator →