#5F75C8
Closest named color: Windows Blue (#3778BF). oklch(58.4% 0.13 270.8), rgb(95, 117, 200).
Aa
Black text reads best on this color (4.86:1).
About this color
#5F75C8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.130 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.045 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #5F75C8 |
| RGB | rgb(95, 117, 200) |
| HSL | hsl(227, 49%, 58%) |
| OKLCH | oklch(58.4% 0.13 270.8) |
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 #5F75C8 | 4.31:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #5F75C8 | 4.86:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #5F75C8 text on white | 4.31:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #5F75C8 text on black | 4.86:1 | AA | Lc -31.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2BFE7
oklch(80.8% 0.058 270.9)
-
Step 400
400
#8B9EDB
oklch(70.8% 0.092 270.6)
-
Step 500
500
#6F84D2
oklch(63.1% 0.12 271.2)
-
Step 600
600 (this color)
#5F75C8
oklch(58.4% 0.13 270.8)
-
Step 700
700
#485AA5
oklch(49.1% 0.122 271.2)
-
Step 800
800
#3B4A85
oklch(42.7% 0.099 270.9)
-
Step 900
900
#323E6B
oklch(37.6% 0.079 270.9)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#5F75C8 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) | #537ECB | 0.026 |
| Deuteranopia (no green cones) | #4775C6 | 0.028 |
| Tritanopia (no blue cones) | #2D8795 | 0.116 |
| Achromatopsia (no color) | #7A7A7A | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F75C8
#5F75C8
oklch(58.4% 0.13 270.8)
- #967700
#967700
oklch(58.3% 0.119 90.5)
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 #5F75C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.045
- Cool Blue #4984B8 ΔE 0.056
- Steel Blue #4682B4 ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.059
- French Blue #436BAD ΔE 0.061
- Royal Blue #4169E1 ΔE 0.064
- Off Blue #5684AE ΔE 0.065
- Flat Blue #3C73A8 ΔE 0.066
Use #5F75C8 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.