#1C5BB4#1C5BB4

#1C5BB4 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.4% C 0.155 H 258.2°. Best body text is #FFFFFF at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#1C5BB4
RGB	rgb(28, 91, 180)
HSL	hsl(215, 73%, 41%)
HSV	hsv(215, 84%, 71%)
CMYK	cmyk(84.4%, 49.4%, 0%, 29.4%)
CIE-LAB	lab(39.62, 14.23, -52.68)
CIE-LCH	lch(39.62, 54.57, 285.11°)
OKLab	oklab(48.39% -0.0316 -0.1517)
OKLCH	oklch(48.39% 0.155 258.2)
XYZ	xyz(12.4552, 11.0228, 44.6423)
Luminance	0.1102 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C5BB4 #B4751C

analogous

#1CA7B4 #1C5BB4 #291CB4

triadic

#1C5BB4 #B41C5B #5BB41C

tetradic

#1C5BB4 #B41CA7 #B4751C #1CB429

square

#1C5BB4 #B41CA7 #B4751C #1CB429

split-complementary

#1C5BB4 #B4291C #A7B41C

monochromatic

#0C254A #14407F #1C5BB4 #2F78DF #649AE7

Accessibility & contrast

On white

6.55

#1C5BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#1C5BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C5BB4

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C5BB4	#FFFFFF	#000000	##FFFFFF
##1C5BB4	1.00	6.55	3.20	6.55
#FFFFFF	6.55	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2565B7

Deuteranopia (green-blind)

#0057B2

Tritanopia (blue-blind)

#00717F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1c5bb4;
/* rgb */ color: rgb(28, 91, 180);
/* oklch */ color: oklch(48.4% 0.155 258.2);

Tailwind

colors: {
  custom: {
    50: '#7488cb',
    500: '#1c5bb4',
    950: '#000000',
  },
}

SCSS

$custom: #1c5bb4;
$custom-light: #7488cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c5bb4",
  "rgb": {
    "r": 28,
    "g": 91,
    "b": 180
  },
  "hsl": {
    "h": 215.132,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.48388,
    "c": 0.15494,
    "h": 258.2
  },
  "luminance": 0.11024
}

Semantic roles & 50–950 ramp

primary

#1C5BB4

secondary

#CC9F60

accent

#A438F0

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1C5BB4

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

Preview Lab → · Contrast checker → · Palette generator →