#277DB1#277DB1

#277DB1 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.4% C 0.113 H 240.3°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#277DB1
RGB	rgb(39, 125, 177)
HSL	hsl(203, 64%, 42%)
HSV	hsv(203, 78%, 69%)
CMYK	cmyk(78%, 29.4%, 0%, 30.6%)
CIE-LAB	lab(49.82, -7.05, -34.67)
CIE-LCH	lch(49.82, 35.38, 258.50°)
OKLab	oklab(56.38% -0.056 -0.0981)
OKLCH	oklch(56.38% 0.113 240.3)
XYZ	xyz(16.1030, 18.2710, 44.2644)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#277DB1 #B15B27

analogous

#27B1A0 #277DB1 #2738B1

triadic

#277DB1 #B1277D #7DB127

tetradic

#277DB1 #A027B1 #B15B27 #38B127

square

#277DB1 #A027B1 #B15B27 #38B127

split-complementary

#277DB1 #B12738 #B1A027

monochromatic

#11364D #1C5A7F #277DB1 #409DD5 #72B7E0

Accessibility & contrast

On white

4.51

#277DB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#277DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #277DB1

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##277DB1	#FFFFFF	#000000	##000000
##277DB1	1.00	4.51	4.65	4.65
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657EB3

Deuteranopia (green-blind)

#5271B0

Tritanopia (blue-blind)

#008A8F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #277db1;
/* rgb */ color: rgb(39, 125, 177);
/* oklch */ color: oklch(56.4% 0.113 240.3);

Tailwind

colors: {
  custom: {
    50: '#76a2c8',
    500: '#277db1',
    950: '#000000',
  },
}

SCSS

$custom: #277db1;
$custom-light: #76a2c8;
$custom-dark: #000000;

JSON

{
  "hex": "#277db1",
  "rgb": {
    "r": 39,
    "g": 125,
    "b": 177
  },
  "hsl": {
    "h": 202.609,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.56383,
    "c": 0.113,
    "h": 240.3
  },
  "luminance": 0.18273
}

Semantic roles & 50–950 ramp

primary

#277DB1

secondary

#C78F6D

accent

#7F41E7

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #277DB1

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

Preview Lab → · Contrast checker → · Palette generator →