#255AB3#255AB3

#255AB3 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.4% C 0.153 H 260.2°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#255AB3
RGB	rgb(37, 90, 179)
HSL	hsl(218, 66%, 42%)
HSV	hsv(218, 79%, 70%)
CMYK	cmyk(79.3%, 49.7%, 0%, 29.8%)
CIE-LAB	lab(39.51, 15.36, -52.26)
CIE-LCH	lch(39.51, 54.47, 286.37°)
OKLab	oklab(48.35% -0.026 -0.1503)
OKLCH	oklch(48.35% 0.153 260.2)
XYZ	xyz(12.5528, 10.9588, 44.0928)
Luminance	0.1096 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255AB3 #B37E25

analogous

#25A1B3 #255AB3 #3725B3

triadic

#255AB3 #B3255A #5AB325

tetradic

#255AB3 #B325A1 #B37E25 #25B337

square

#255AB3 #B325A1 #B37E25 #25B337

split-complementary

#255AB3 #B33725 #A1B325

monochromatic

#10274E #1B4080 #255AB3 #3E77D7 #719BE2

Accessibility & contrast

On white

6.58

#255AB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#255AB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255AB3

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255AB3	#FFFFFF	#000000	##FFFFFF
##255AB3	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2564B6

Deuteranopia (green-blind)

#0057B1

Tritanopia (blue-blind)

#006F7E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #255ab3;
/* rgb */ color: rgb(37, 90, 179);
/* oklch */ color: oklch(48.4% 0.153 260.2);

Tailwind

colors: {
  custom: {
    50: '#7688ca',
    500: '#255ab3',
    950: '#000000',
  },
}

SCSS

$custom: #255ab3;
$custom-light: #7688ca;
$custom-dark: #000000;

JSON

{
  "hex": "#255ab3",
  "rgb": {
    "r": 37,
    "g": 90,
    "b": 179
  },
  "hsl": {
    "h": 217.606,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.48353,
    "c": 0.15255,
    "h": 260.2
  },
  "luminance": 0.1096
}

Semantic roles & 50–950 ramp

primary

#255AB3

secondary

#C8A66B

accent

#A93FE9

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255AB3

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

Preview Lab → · Contrast checker → · Palette generator →