#377CDD#377CDD

#377CDD is a mid, vivid blue. Relative luminance 0.204; OKLCH L 59.2% C 0.164 H 257.6°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#377CDD
RGB	rgb(55, 124, 221)
HSL	hsl(215, 71%, 54%)
HSV	hsv(215, 75%, 87%)
CMYK	cmyk(75.1%, 43.9%, 0%, 13.3%)
CIE-LAB	lab(52.34, 11.64, -55.76)
CIE-LCH	lch(52.34, 56.97, 281.79°)
OKLab	oklab(59.25% -0.0351 -0.1597)
OKLCH	oklch(59.25% 0.164 257.6)
XYZ	xyz(21.8296, 20.4455, 71.1885)
Luminance	0.2045 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CDD #DD9837

analogous

#37CFDD #377CDD #4537DD

triadic

#377CDD #DD377C #7CDD37

tetradic

#377CDD #DD37CF #DD9837 #37DD45

square

#377CDD #DD37CF #DD9837 #37DD45

split-complementary

#377CDD #DD4537 #CFDD37

monochromatic

#164483 #1F5FB8 #377CDD #6B9EE6 #A0C1EF

Accessibility & contrast

On white

4.13

#377CDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#377CDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CDD

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CDD	#FFFFFF	#000000	##000000
##377CDD	1.00	4.13	5.09	5.09
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B85E1

Deuteranopia (green-blind)

#2A76DB

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #377cdd;
/* rgb */ color: rgb(55, 124, 221);
/* oklch */ color: oklch(59.2% 0.164 257.6);

Tailwind

colors: {
  custom: {
    50: '#84a1e8',
    500: '#377cdd',
    950: '#000000',
  },
}

SCSS

$custom: #377cdd;
$custom-light: #84a1e8;
$custom-dark: #000000;

JSON

{
  "hex": "#377cdd",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 221
  },
  "hsl": {
    "h": 215.06,
    "s": 70.94,
    "l": 54.118
  },
  "oklch": {
    "l": 0.59246,
    "c": 0.16356,
    "h": 257.6
  },
  "luminance": 0.20448
}

Semantic roles & 50–950 ramp

primary

#377CDD

secondary

#DBBE95

accent

#A33AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #377CDD

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

Preview Lab → · Contrast checker → · Palette generator →