#2591B3#2591B3

#2591B3 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.3% C 0.105 H 224.3°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#2591B3
RGB	rgb(37, 145, 179)
HSL	hsl(194, 66%, 42%)
HSV	hsv(194, 79%, 70%)
CMYK	cmyk(79.3%, 19%, 0%, 29.8%)
CIE-LAB	lab(55.98, -17.81, -26.23)
CIE-LCH	lch(55.98, 31.71, 235.82°)
OKLab	oklab(61.31% -0.0753 -0.0736)
OKLCH	oklch(61.31% 0.105 224.3)
XYZ	xyz(19.0216, 23.8964, 46.2490)
Luminance	0.2390 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2591B3 #B34725

analogous

#25B38E #2591B3 #254AB3

triadic

#2591B3 #B32591 #91B325

tetradic

#2591B3 #8E25B3 #B34725 #4AB325

square

#2591B3 #8E25B3 #B34725 #4AB325

split-complementary

#2591B3 #B3254A #B38E25

monochromatic

#103F4E #1B6880 #2591B3 #3EB2D7 #71C7E2

Accessibility & contrast

On white

3.63

#2591B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#2591B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2591B3

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2591B3	#FFFFFF	#000000	##000000
##2591B3	1.00	3.63	5.78	5.78
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB5

Deuteranopia (green-blind)

#6B80B3

Tritanopia (blue-blind)

#009B9C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #2591b3;
/* rgb */ color: rgb(37, 145, 179);
/* oklch */ color: oklch(61.3% 0.105 224.3);

Tailwind

colors: {
  custom: {
    50: '#77b1c9',
    500: '#2591b3',
    950: '#000000',
  },
}

SCSS

$custom: #2591b3;
$custom-light: #77b1c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2591b3",
  "rgb": {
    "r": 37,
    "g": 145,
    "b": 179
  },
  "hsl": {
    "h": 194.366,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.61314,
    "c": 0.1053,
    "h": 224.3
  },
  "luminance": 0.23899
}

Semantic roles & 50–950 ramp

primary

#2591B3

secondary

#C8826B

accent

#683FE9

background

#F7FAFC

surface

#EEF5F8

border

#C9CFD1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #2591B3

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

Preview Lab → · Contrast checker → · Palette generator →