#1F58B3#1F58B3

#1F58B3 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.7% C 0.157 H 259.7°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F58B3
RGB	rgb(31, 88, 179)
HSL	hsl(217, 70%, 41%)
HSV	hsv(217, 83%, 70%)
CMYK	cmyk(82.7%, 50.8%, 0%, 29.8%)
CIE-LAB	lab(38.77, 16.08, -53.47)
CIE-LCH	lch(38.77, 55.83, 286.73°)
OKLab	oklab(47.73% -0.028 -0.154)
OKLCH	oklch(47.73% 0.157 259.7)
XYZ	xyz(12.1885, 10.5239, 44.0280)
Luminance	0.1052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F58B3 #B37A1F

analogous

#1FA2B3 #1F58B3 #301FB3

triadic

#1F58B3 #B31F58 #58B31F

tetradic

#1F58B3 #B31FA2 #B37A1F #1FB330

square

#1F58B3 #B31FA2 #B37A1F #1FB330

split-complementary

#1F58B3 #B3301F #A2B31F

monochromatic

#0D254B #163E7F #1F58B3 #3374DC #6898E5

Accessibility & contrast

On white

6.76

#1F58B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#1F58B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F58B3

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F58B3	#FFFFFF	#000000	##FFFFFF
##1F58B3	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D62B6

Deuteranopia (green-blind)

#0055B1

Tritanopia (blue-blind)

#006E7D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1f58b3;
/* rgb */ color: rgb(31, 88, 179);
/* oklch */ color: oklch(47.7% 0.157 259.7);

Tailwind

colors: {
  custom: {
    50: '#7486ca',
    500: '#1f58b3',
    950: '#000000',
  },
}

SCSS

$custom: #1f58b3;
$custom-light: #7486ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f58b3",
  "rgb": {
    "r": 31,
    "g": 88,
    "b": 179
  },
  "hsl": {
    "h": 216.892,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.47734,
    "c": 0.15653,
    "h": 259.7
  },
  "luminance": 0.10525
}

Semantic roles & 50–950 ramp

primary

#1F58B3

secondary

#CAA364

accent

#A83BED

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1F58B3

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

Preview Lab → · Contrast checker → · Palette generator →