#255AAF#255AAF

#255AAF is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.1% C 0.147 H 259.6°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#255AAF
RGB	rgb(37, 90, 175)
HSL	hsl(217, 65%, 42%)
HSV	hsv(217, 79%, 69%)
CMYK	cmyk(78.9%, 48.6%, 0%, 31.4%)
CIE-LAB	lab(39.24, 13.80, -50.34)
CIE-LCH	lch(39.24, 52.19, 285.33°)
OKLab	oklab(48.06% -0.0266 -0.1447)
OKLCH	oklch(48.06% 0.147 259.6)
XYZ	xyz(12.1542, 10.7994, 41.9930)
Luminance	0.1080 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255AAF #AF7A25

analogous

#259FAF #255AAF #3525AF

triadic

#255AAF #AF255A #5AAF25

tetradic

#255AAF #AF259F #AF7A25 #25AF35

square

#255AAF #AF259F #AF7A25 #25AF35

split-complementary

#255AAF #AF3525 #9FAF25

monochromatic

#10264A #1A407C #255AAF #3C77D6 #6E9AE0

Accessibility & contrast

On white

6.65

#255AAF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#255AAF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255AAF

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255AAF	#FFFFFF	#000000	##FFFFFF
##255AAF	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2963B2

Deuteranopia (green-blind)

#0057AD

Tritanopia (blue-blind)

#006E7C

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #255aaf;
/* rgb */ color: rgb(37, 90, 175);
/* oklch */ color: oklch(48.1% 0.147 259.6);

Tailwind

colors: {
  custom: {
    50: '#7588c7',
    500: '#255aaf',
    950: '#000000',
  },
}

SCSS

$custom: #255aaf;
$custom-light: #7588c7;
$custom-dark: #000000;

JSON

{
  "hex": "#255aaf",
  "rgb": {
    "r": 37,
    "g": 90,
    "b": 175
  },
  "hsl": {
    "h": 216.957,
    "s": 65.094,
    "l": 41.569
  },
  "oklch": {
    "l": 0.48059,
    "c": 0.14709,
    "h": 259.6
  },
  "luminance": 0.10801
}

Semantic roles & 50–950 ramp

primary

#255AAF

secondary

#C7A369

accent

#A740E8

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #255AAF

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

Preview Lab → · Contrast checker → · Palette generator →