#3F5E89
Closest named color: Denim (#3B638C). oklch(47.7% 0.079 256.7), rgb(63, 94, 137).
Aa
White text reads best on this color (6.61:1).
About this color
#3F5E89 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.079 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.014 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #3F5E89 |
| RGB | rgb(63, 94, 137) |
| HSL | hsl(215, 37%, 39%) |
| OKLCH | oklch(47.7% 0.079 256.7) |
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 #3F5E89 | 6.61:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #3F5E89 | 3.17:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #3F5E89 text on white | 6.61:1 | AA | Lc 82.6 | Fine for body text |
| #3F5E89 text on black | 3.17:1 | AA large text | Lc -19.3 | 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
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B1C2DA
oklch(80.9% 0.039 257)
-
Step 400
400
#88A2C7
oklch(70.6% 0.062 257.2)
-
Step 500
500
#6B8BB9
oklch(63.1% 0.079 257.4)
-
Step 600
600
#5275A5
oklch(55.7% 0.085 256.5)
-
Step 700
700 (this color)
#3F5E89
oklch(47.7% 0.079 256.7)
-
Step 800
800
#375073
oklch(42.7% 0.066 256.9)
-
Step 900
900
#30425D
oklch(37.6% 0.052 258.3)
-
Step 950
950
#1C2736
oklch(27% 0.032 256.3)
#3F5E89 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) | #4D618B | 0.021 |
| Deuteranopia (no green cones) | #445988 | 0.015 |
| Tritanopia (no blue cones) | #18686D | 0.071 |
| Achromatopsia (no color) | #5D5D5D | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5E89
#3F5E89
oklch(47.7% 0.079 256.7)
- #765624
#765624
oklch(47.7% 0.079 75.9)
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 #3F5E89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.014
- Denim Blue #3B5B92 ΔE 0.020
- Dusky Blue #475F94 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.023
- YInMn Blue #415A77 ΔE 0.029
- Dusk #4E5481 ΔE 0.032
- Dusty Grape #545775 ΔE 0.041
- Twilight #4E518B ΔE 0.041
Use #3F5E89 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.