#255BB4#255BB4

#255BB4 is a mid, vivid blue. Relative luminance 0.112; OKLCH L 48.6% C 0.153 H 260.0°. Best body text is #FFFFFF at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#255BB4
RGB	rgb(37, 91, 180)
HSL	hsl(217, 66%, 43%)
HSV	hsv(217, 79%, 71%)
CMYK	cmyk(79.4%, 49.4%, 0%, 29.4%)
CIE-LAB	lab(39.86, 15.09, -52.28)
CIE-LCH	lch(39.86, 54.41, 286.10°)
OKLab	oklab(48.65% -0.0266 -0.1504)
OKLCH	oklch(48.65% 0.153 260)
XYZ	xyz(12.7393, 11.1693, 44.6556)
Luminance	0.1117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255BB4 #B47E25

analogous

#25A2B4 #255BB4 #3725B4

triadic

#255BB4 #B4255B #5BB425

tetradic

#255BB4 #B425A2 #B47E25 #25B437

square

#255BB4 #B425A2 #B47E25 #25B437

split-complementary

#255BB4 #B43725 #A2B425

monochromatic

#10284E #1B4181 #255BB4 #3F78D7 #719CE2

Accessibility & contrast

On white

6.49

#255BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#255BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255BB4

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255BB4	#FFFFFF	#000000	##FFFFFF
##255BB4	1.00	6.49	3.23	6.49
#FFFFFF	6.49	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2665B7

Deuteranopia (green-blind)

#0058B2

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #255bb4;
/* rgb */ color: rgb(37, 91, 180);
/* oklch */ color: oklch(48.6% 0.153 260.0);

Tailwind

colors: {
  custom: {
    50: '#7688cb',
    500: '#255bb4',
    950: '#000000',
  },
}

SCSS

$custom: #255bb4;
$custom-light: #7688cb;
$custom-dark: #000000;

JSON

{
  "hex": "#255bb4",
  "rgb": {
    "r": 37,
    "g": 91,
    "b": 180
  },
  "hsl": {
    "h": 217.343,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.48646,
    "c": 0.15268,
    "h": 260
  },
  "luminance": 0.11171
}

Semantic roles & 50–950 ramp

primary

#255BB4

secondary

#C9A66C

accent

#A93FE9

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255BB4

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

Preview Lab → · Contrast checker → · Palette generator →