#2558B1#2558B1

#2558B1 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.8% C 0.152 H 260.7°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#2558B1
RGB	rgb(37, 88, 177)
HSL	hsl(218, 65%, 42%)
HSV	hsv(218, 79%, 69%)
CMYK	cmyk(79.1%, 50.3%, 0%, 30.6%)
CIE-LAB	lab(38.80, 15.89, -52.22)
CIE-LCH	lch(38.80, 54.59, 286.93°)
OKLab	oklab(47.77% -0.0247 -0.1502)
OKLCH	oklch(47.77% 0.152 260.7)
XYZ	xyz(12.1856, 10.5457, 42.9797)
Luminance	0.1055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2558B1 #B17E25

analogous

#259EB1 #2558B1 #3825B1

triadic

#2558B1 #B12558 #58B125

tetradic

#2558B1 #B1259E #B17E25 #25B138

square

#2558B1 #B1259E #B17E25 #25B138

split-complementary

#2558B1 #B13825 #9EB125

monochromatic

#10264C #1A3F7E #2558B1 #3D75D6 #6F99E1

Accessibility & contrast

On white

6.75

#2558B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#2558B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2558B1

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2558B1	#FFFFFF	#000000	##FFFFFF
##2558B1	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2162B4

Deuteranopia (green-blind)

#0055AF

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #2558b1;
/* rgb */ color: rgb(37, 88, 177);
/* oklch */ color: oklch(47.8% 0.152 260.7);

Tailwind

colors: {
  custom: {
    50: '#7686c9',
    500: '#2558b1',
    950: '#000000',
  },
}

SCSS

$custom: #2558b1;
$custom-light: #7686c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2558b1",
  "rgb": {
    "r": 37,
    "g": 88,
    "b": 177
  },
  "hsl": {
    "h": 218.143,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.47768,
    "c": 0.15226,
    "h": 260.7
  },
  "luminance": 0.10547
}

Semantic roles & 50–950 ramp

primary

#2558B1

secondary

#C8A66A

accent

#AB3FE8

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #2558B1

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

Preview Lab → · Contrast checker → · Palette generator →