#2583B0#2583B0

#2583B0 is a mid, moderate cyan. Relative luminance 0.198; OKLCH L 57.7% C 0.109 H 234.6°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#2583B0
RGB	rgb(37, 131, 176)
HSL	hsl(199, 65%, 42%)
HSV	hsv(199, 79%, 69%)
CMYK	cmyk(79%, 25.6%, 0%, 31%)
CIE-LAB	lab(51.56, -11.10, -31.37)
CIE-LCH	lch(51.56, 33.28, 250.51°)
OKLab	oklab(57.74% -0.063 -0.0885)
OKLCH	oklch(57.74% 0.109 234.6)
XYZ	xyz(16.7126, 19.7585, 43.9988)
Luminance	0.1976 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2583B0 #B05225

analogous

#25B097 #2583B0 #253EB0

triadic

#2583B0 #B02583 #83B025

tetradic

#2583B0 #9725B0 #B05225 #3EB025

square

#2583B0 #9725B0 #B05225 #3EB025

split-complementary

#2583B0 #B0253E #B09725

monochromatic

#10384B #1A5D7D #2583B0 #3CA4D6 #6FBCE1

Accessibility & contrast

On white

4.24

#2583B0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#2583B0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2583B0

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2583B0	#FFFFFF	#000000	##000000
##2583B0	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D82B2

Deuteranopia (green-blind)

#5A75AF

Tritanopia (blue-blind)

#008F92

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #2583b0;
/* rgb */ color: rgb(37, 131, 176);
/* oklch */ color: oklch(57.7% 0.109 234.6);

Tailwind

colors: {
  custom: {
    50: '#76a7c7',
    500: '#2583b0',
    950: '#000000',
  },
}

SCSS

$custom: #2583b0;
$custom-light: #76a7c7;
$custom-dark: #000000;

JSON

{
  "hex": "#2583b0",
  "rgb": {
    "r": 37,
    "g": 131,
    "b": 176
  },
  "hsl": {
    "h": 199.424,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.57738,
    "c": 0.10862,
    "h": 234.6
  },
  "luminance": 0.19761
}

Semantic roles & 50–950 ramp

primary

#2583B0

secondary

#C7886A

accent

#7640E8

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #2583B0

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

Preview Lab → · Contrast checker → · Palette generator →