#277EA4#277EA4

#277EA4 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.0% C 0.099 H 231.6°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#277EA4
RGB	rgb(39, 126, 164)
HSL	hsl(198, 62%, 40%)
HSV	hsv(198, 76%, 64%)
CMYK	cmyk(76.2%, 23.2%, 0%, 35.7%)
CIE-LAB	lab(49.53, -12.30, -27.58)
CIE-LCH	lch(49.53, 30.20, 245.96°)
OKLab	oklab(55.96% -0.0615 -0.0776)
OKLCH	oklch(55.96% 0.099 231.6)
XYZ	xyz(14.9957, 18.0316, 37.8049)
Luminance	0.1803 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#277EA4 #A44D27

analogous

#27A48C #277EA4 #2740A4

triadic

#277EA4 #A4277E #7EA427

tetradic

#277EA4 #8C27A4 #A44D27 #40A427

square

#277EA4 #8C27A4 #A44D27 #40A427

split-complementary

#277EA4 #A42740 #A48C27

monochromatic

#0F3241 #1B5873 #277EA4 #38A2D0 #6AB9DC

Accessibility & contrast

On white

4.56

#277EA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#277EA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #277EA4

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##277EA4	#FFFFFF	#000000	##000000
##277EA4	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7CA6

Deuteranopia (green-blind)

#5A71A3

Tritanopia (blue-blind)

#00888B

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #277ea4;
/* rgb */ color: rgb(39, 126, 164);
/* oklch */ color: oklch(56.0% 0.099 231.6);

Tailwind

colors: {
  custom: {
    50: '#74a3bf',
    500: '#277ea4',
    950: '#000000',
  },
}

SCSS

$custom: #277ea4;
$custom-light: #74a3bf;
$custom-dark: #000000;

JSON

{
  "hex": "#277ea4",
  "rgb": {
    "r": 39,
    "g": 126,
    "b": 164
  },
  "hsl": {
    "h": 198.24,
    "s": 61.576,
    "l": 39.804
  },
  "oklch": {
    "l": 0.55957,
    "c": 0.099,
    "h": 231.6
  },
  "luminance": 0.18033
}

Semantic roles & 50–950 ramp

primary

#277EA4

secondary

#C28165

accent

#7443E5

background

#F7FAFB

surface

#EEF3F7

border

#C9CDD0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #277EA4

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

Preview Lab → · Contrast checker → · Palette generator →