#4F75BA
Closest named color: Windows Blue (#3778BF). oklch(56.6% 0.116 261.5), rgb(79, 117, 186).
Aa
Black text reads best on this color (4.58:1).
About this color
#4F75BA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.116 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.023 away. Black text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #4F75BA |
| RGB | rgb(79, 117, 186) |
| HSL | hsl(219, 44%, 52%) |
| OKLCH | oklch(56.6% 0.116 261.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4F75BA | 4.57:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #4F75BA | 4.58:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #4F75BA text on white | 4.57:1 | AA | Lc 71.6 | Content text, not long reading |
| #4F75BA text on black | 4.58:1 | AA | Lc -30.0 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC1E3
oklch(80.8% 0.053 262.1)
-
Step 400
400
#84A1D5
oklch(70.7% 0.083 261.8)
-
Step 500
500
#6589CA
oklch(63.1% 0.107 261.7)
-
Step 600
600 (this color)
#4F75BA
oklch(56.6% 0.116 261.5)
-
Step 700
700
#3D5F9D
oklch(49% 0.107 261.5)
-
Step 800
800
#334E80
oklch(42.8% 0.09 261.8)
-
Step 900
900
#2C4166
oklch(37.6% 0.069 261.2)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#4F75BA with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #587BBD | 0.021 |
| Deuteranopia (no green cones) | #4B71B9 | 0.013 |
| Tritanopia (no blue cones) | #00848E | 0.103 |
| Achromatopsia (no color) | #757575 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F75BA
#4F75BA
oklch(56.6% 0.116 261.5)
- #986E04
#986E04
oklch(56.6% 0.116 81.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4F75BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.036
- French Blue #436BAD ΔE 0.036
- Steel Blue #4682B4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.048
- Dull Blue #49759C ΔE 0.049
- Muted Blue #3B719F ΔE 0.049
Use #4F75BA in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.