#21579B#21579B

#21579B is a mid, vivid cyan. Relative luminance 0.095; OKLCH L 45.8% C 0.124 H 255.9°. Best body text is #FFFFFF at 7.24:1 contrast (WCAG AA passes).

Color values

HEX	#21579B
RGB	rgb(33, 87, 155)
HSL	hsl(213, 65%, 37%)
HSV	hsv(213, 79%, 61%)
CMYK	cmyk(78.7%, 43.9%, 0%, 39.2%)
CIE-LAB	lab(36.94, 7.46, -42.13)
CIE-LCH	lch(36.94, 42.79, 280.04°)
OKLab	oklab(45.83% -0.0302 -0.1206)
OKLCH	oklch(45.83% 0.124 255.9)
XYZ	xyz(9.9496, 9.5051, 32.3143)
Luminance	0.0951 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21579B #9B6521

analogous

#21949B #21579B #28219B

triadic

#21579B #9B2157 #579B21

tetradic

#21579B #9B2194 #9B6521 #219B28

square

#21579B #9B2194 #9B6521 #219B28

split-complementary

#21579B #9B2821 #949B21

monochromatic

#0C1E36 #163B69 #21579B #2C73CD #5A94DC

Accessibility & contrast

On white

7.24

#21579B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#21579B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21579B

7.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21579B	#FFFFFF	#000000	##FFFFFF
##21579B	1.00	7.24	2.90	7.24
#FFFFFF	7.24	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#355D9E

Deuteranopia (green-blind)

#1E529A

Tritanopia (blue-blind)

#006771

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #21579b;
/* rgb */ color: rgb(33, 87, 155);
/* oklch */ color: oklch(45.8% 0.124 255.9);

Tailwind

colors: {
  custom: {
    50: '#6f85b9',
    500: '#21579b',
    950: '#000000',
  },
}

SCSS

$custom: #21579b;
$custom-light: #6f85b9;
$custom-dark: #000000;

JSON

{
  "hex": "#21579b",
  "rgb": {
    "r": 33,
    "g": 87,
    "b": 155
  },
  "hsl": {
    "h": 213.443,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.45832,
    "c": 0.12437,
    "h": 255.9
  },
  "luminance": 0.09506
}

Semantic roles & 50–950 ramp

primary

#21579B

secondary

#C09258

accent

#9E40E8

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080B11

muted

#7B7C80

Preview Lab

Preview with #21579B

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

Preview Lab → · Contrast checker → · Palette generator →