#2591B0#2591B0

#2591B0 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.2% C 0.103 H 222.1°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#2591B0
RGB	rgb(37, 145, 176)
HSL	hsl(193, 65%, 42%)
HSV	hsv(193, 79%, 69%)
CMYK	cmyk(79%, 17.6%, 0%, 31%)
CIE-LAB	lab(55.86, -18.84, -24.71)
CIE-LCH	lch(55.86, 31.07, 232.68°)
OKLab	oklab(61.18% -0.0765 -0.0692)
OKLCH	oklch(61.18% 0.103 222.1)
XYZ	xyz(18.7215, 23.7764, 44.6685)
Luminance	0.2378 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2591B0 #B04425

analogous

#25B08A #2591B0 #254CB0

triadic

#2591B0 #B02591 #91B025

tetradic

#2591B0 #8A25B0 #B04425 #4CB025

square

#2591B0 #8A25B0 #B04425 #4CB025

split-complementary

#2591B0 #B0254C #B08A25

monochromatic

#103E4B #1A677D #2591B0 #3CB4D6 #6FC7E1

Accessibility & contrast

On white

3.65

#2591B0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#2591B0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2591B0

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2591B0	#FFFFFF	#000000	##000000
##2591B0	1.00	3.65	5.76	5.76
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F8DB2

Deuteranopia (green-blind)

#6D80B0

Tritanopia (blue-blind)

#009B9B

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #2591b0;
/* rgb */ color: rgb(37, 145, 176);
/* oklch */ color: oklch(61.2% 0.103 222.1);

Tailwind

colors: {
  custom: {
    50: '#77b1c7',
    500: '#2591b0',
    950: '#000000',
  },
}

SCSS

$custom: #2591b0;
$custom-light: #77b1c7;
$custom-dark: #000000;

JSON

{
  "hex": "#2591b0",
  "rgb": {
    "r": 37,
    "g": 145,
    "b": 176
  },
  "hsl": {
    "h": 193.381,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.61178,
    "c": 0.10315,
    "h": 222.1
  },
  "luminance": 0.23779
}

Semantic roles & 50–950 ramp

primary

#2591B0

secondary

#C77E6A

accent

#6540E8

background

#F7FAFC

surface

#EEF5F8

border

#C9CFD1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #2591B0

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

Preview Lab → · Contrast checker → · Palette generator →