#375BB1#375BB1

#375BB1 is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.2% C 0.143 H 264.6°. Best body text is #FFFFFF at 6.38:1 contrast (WCAG AA passes).

Color values

HEX	#375BB1
RGB	rgb(55, 91, 177)
HSL	hsl(222, 53%, 45%)
HSV	hsv(222, 69%, 69%)
CMYK	cmyk(68.9%, 48.6%, 0%, 30.6%)
CIE-LAB	lab(40.36, 16.34, -49.68)
CIE-LCH	lch(40.36, 52.30, 288.20°)
OKLab	oklab(49.15% -0.0134 -0.1424)
OKLCH	oklch(49.15% 0.143 264.6)
XYZ	xyz(13.2497, 11.4674, 43.1016)
Luminance	0.1147 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#375BB1 #B18D37

analogous

#3798B1 #375BB1 #5037B1

triadic

#375BB1 #B1375B #5BB137

tetradic

#375BB1 #B13798 #B18D37 #37B150

square

#375BB1 #B13798 #B18D37 #37B150

split-complementary

#375BB1 #B15037 #98B137

monochromatic

#1A2B54 #284382 #375BB1 #5A7BCC #88A0DA

Accessibility & contrast

On white

6.38

#375BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#375BB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #375BB1

6.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##375BB1	#FFFFFF	#000000	##FFFFFF
##375BB1	1.00	6.38	3.29	6.38
#FFFFFF	6.38	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D65B4

Deuteranopia (green-blind)

#0C5AAF

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #375bb1;
/* rgb */ color: rgb(55, 91, 177);
/* oklch */ color: oklch(49.2% 0.143 264.6);

Tailwind

colors: {
  custom: {
    50: '#7c88c9',
    500: '#375bb1',
    950: '#000000',
  },
}

SCSS

$custom: #375bb1;
$custom-light: #7c88c9;
$custom-dark: #000000;

JSON

{
  "hex": "#375bb1",
  "rgb": {
    "r": 55,
    "g": 91,
    "b": 177
  },
  "hsl": {
    "h": 222.295,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.49151,
    "c": 0.14306,
    "h": 264.6
  },
  "luminance": 0.11469
}

Semantic roles & 50–950 ramp

primary

#375BB1

secondary

#C4B080

accent

#B14CDC

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #375BB1

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

Preview Lab → · Contrast checker → · Palette generator →