#277BBD#277BBD

#277BBD is a mid, vivid cyan. Relative luminance 0.183; OKLCH L 56.6% C 0.129 H 246.9°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#277BBD
RGB	rgb(39, 123, 189)
HSL	hsl(206, 66%, 45%)
HSV	hsv(206, 79%, 74%)
CMYK	cmyk(79.4%, 34.9%, 0%, 25.9%)
CIE-LAB	lab(49.82, -1.44, -41.59)
CIE-LCH	lch(49.82, 41.62, 268.02°)
OKLab	oklab(56.58% -0.0505 -0.1183)
OKLCH	oklch(56.58% 0.129 246.9)
XYZ	xyz(17.1014, 18.2693, 50.7593)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#277BBD #BD6927

analogous

#27BDB4 #277BBD #2730BD

triadic

#277BBD #BD277B #7BBD27

tetradic

#277BBD #B427BD #BD6927 #30BD27

square

#277BBD #B427BD #BD6927 #30BD27

split-complementary

#277BBD #BD2730 #BDB427

monochromatic

#123958 #1D5A8A #277BBD #4899D9 #7BB6E4

Accessibility & contrast

On white

4.51

#277BBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#277BBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #277BBD

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##277BBD	#FFFFFF	#000000	##000000
##277BBD	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)

#5C7EC0

Deuteranopia (green-blind)

#4670BC

Tritanopia (blue-blind)

#008B93

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #277bbd;
/* rgb */ color: rgb(39, 123, 189);
/* oklch */ color: oklch(56.6% 0.129 246.9);

Tailwind

colors: {
  custom: {
    50: '#78a0d1',
    500: '#277bbd',
    950: '#000000',
  },
}

SCSS

$custom: #277bbd;
$custom-light: #78a0d1;
$custom-dark: #000000;

JSON

{
  "hex": "#277bbd",
  "rgb": {
    "r": 39,
    "g": 123,
    "b": 189
  },
  "hsl": {
    "h": 206.4,
    "s": 65.789,
    "l": 44.706
  },
  "oklch": {
    "l": 0.56578,
    "c": 0.12869,
    "h": 246.9
  },
  "luminance": 0.18271
}

Semantic roles & 50–950 ramp

primary

#277BBD

secondary

#CC9B74

accent

#8A3FE9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0A0E14

muted

#7C7E82

Preview Lab

Preview with #277BBD

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

Preview Lab → · Contrast checker → · Palette generator →