#3F5D8A
Closest named color: Denim Blue (#3B5B92). oklch(47.6% 0.082 258.3), rgb(63, 93, 138).
Aa
White text reads best on this color (6.67:1).
About this color
#3F5D8A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.082 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.016 away. White text reads best on it, at 6.67:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #3F5D8A |
| RGB | rgb(63, 93, 138) |
| HSL | hsl(216, 37%, 39%) |
| OKLCH | oklch(47.6% 0.082 258.3) |
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 #3F5D8A | 6.67:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #3F5D8A | 3.14:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #3F5D8A text on white | 6.67:1 | AA | Lc 82.9 | Fine for body text |
| #3F5D8A text on black | 3.14:1 | AA large text | Lc -19.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B1C2DB
oklch(80.9% 0.04 257.9)
-
Step 400
400
#89A2C8
oklch(70.7% 0.063 258.6)
-
Step 500
500
#6B8BBA
oklch(63.1% 0.08 257.9)
-
Step 600
600
#5374A6
oklch(55.5% 0.087 258.5)
-
Step 700
700 (this color)
#3F5D8A
oklch(47.6% 0.082 258.3)
-
Step 800
800
#375074
oklch(42.8% 0.068 257.5)
-
Step 900
900
#30425E
oklch(37.7% 0.054 259)
-
Step 950
950
#1C2737
oklch(27% 0.034 257.7)
#3F5D8A 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) | #4B608C | 0.019 |
| Deuteranopia (no green cones) | #425989 | 0.012 |
| Tritanopia (no blue cones) | #17676D | 0.073 |
| Achromatopsia (no color) | #5C5C5C | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5D8A
#3F5D8A
oklch(47.6% 0.082 258.3)
- #755620
#755620
oklch(47.5% 0.081 78.2)
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 #3F5D8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.016
- Denim #3B638C ΔE 0.017
- Dusky Blue #475F94 ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.022
- YInMn Blue #415A77 ΔE 0.030
- Dusk #4E5481 ΔE 0.031
- Twilight #4E518B ΔE 0.038
- Dusty Grape #545775 ΔE 0.042
Use #3F5D8A 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.