#277BB0#277BB0

#277BB0 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.8% C 0.113 H 241.3°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#277BB0
RGB	rgb(39, 123, 176)
HSL	hsl(203, 64%, 42%)
HSV	hsv(203, 78%, 69%)
CMYK	cmyk(77.8%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.17, -6.24, -35.12)
CIE-LCH	lch(49.17, 35.67, 259.92°)
OKLab	oklab(55.85% -0.0544 -0.0995)
OKLCH	oklch(55.85% 0.113 241.3)
XYZ	xyz(15.7531, 17.7300, 43.6579)
Luminance	0.1773 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#277BB0 #B05C27

analogous

#27B0A1 #277BB0 #2736B0

triadic

#277BB0 #B0277B #7BB027

tetradic

#277BB0 #A127B0 #B05C27 #36B027

square

#277BB0 #A127B0 #B05C27 #36B027

split-complementary

#277BB0 #B02736 #B0A127

monochromatic

#11354C #1C587E #277BB0 #409BD5 #72B5E0

Accessibility & contrast

On white

4.62

#277BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#277BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #277BB0

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##277BB0	#FFFFFF	#000000	##FFFFFF
##277BB0	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB2

Deuteranopia (green-blind)

#4F6FAF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #277bb0;
/* rgb */ color: rgb(39, 123, 176);
/* oklch */ color: oklch(55.8% 0.113 241.3);

Tailwind

colors: {
  custom: {
    50: '#76a1c8',
    500: '#277bb0',
    950: '#000000',
  },
}

SCSS

$custom: #277bb0;
$custom-light: #76a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#277bb0",
  "rgb": {
    "r": 39,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 203.212,
    "s": 63.721,
    "l": 42.157
  },
  "oklch": {
    "l": 0.55847,
    "c": 0.1134,
    "h": 241.3
  },
  "luminance": 0.17732
}

Semantic roles & 50–950 ramp

primary

#277BB0

secondary

#C78F6C

accent

#8141E7

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #277BB0

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

Preview Lab → · Contrast checker → · Palette generator →