#255BB3#255BB3

#255BB3 is a mid, vivid blue. Relative luminance 0.111; OKLCH L 48.6% C 0.151 H 259.8°. Best body text is #FFFFFF at 6.51:1 contrast (WCAG AA passes).

Color values

HEX	#255BB3
RGB	rgb(37, 91, 179)
HSL	hsl(217, 66%, 42%)
HSV	hsv(217, 79%, 70%)
CMYK	cmyk(79.3%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(39.80, 14.70, -51.80)
CIE-LCH	lch(39.80, 53.84, 285.84°)
OKLab	oklab(48.57% -0.0267 -0.1489)
OKLCH	oklch(48.57% 0.151 259.8)
XYZ	xyz(12.6378, 11.1287, 44.1211)
Luminance	0.1113 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255BB3 #B37D25

analogous

#25A2B3 #255BB3 #3625B3

triadic

#255BB3 #B3255B #5BB325

tetradic

#255BB3 #B325A2 #B37D25 #25B336

square

#255BB3 #B325A2 #B37D25 #25B336

split-complementary

#255BB3 #B33625 #A2B325

monochromatic

#10274E #1B4180 #255BB3 #3E78D7 #719CE2

Accessibility & contrast

On white

6.51

#255BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#255BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255BB3

6.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255BB3	#FFFFFF	#000000	##FFFFFF
##255BB3	1.00	6.51	3.23	6.51
#FFFFFF	6.51	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2765B6

Deuteranopia (green-blind)

#0058B1

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #255bb3;
/* rgb */ color: rgb(37, 91, 179);
/* oklch */ color: oklch(48.6% 0.151 259.8);

Tailwind

colors: {
  custom: {
    50: '#7688ca',
    500: '#255bb3',
    950: '#000000',
  },
}

SCSS

$custom: #255bb3;
$custom-light: #7688ca;
$custom-dark: #000000;

JSON

{
  "hex": "#255bb3",
  "rgb": {
    "r": 37,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 217.183,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.48572,
    "c": 0.15133,
    "h": 259.8
  },
  "luminance": 0.1113
}

Semantic roles & 50–950 ramp

primary

#255BB3

secondary

#C8A56B

accent

#A83FE9

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255BB3

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

Preview Lab → · Contrast checker → · Palette generator →