#3F6590
Closest named color: Denim (#3B638C). oklch(49.8% 0.082 252.5), rgb(63, 101, 144).
Aa
White text reads best on this color (6.04:1).
About this color
#3F6590 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.082 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.010 away. White text reads best on it, at 6.04:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.47:1 |
| White text | 6.04:1 |
Values
| HEX | #3F6590 |
| RGB | rgb(63, 101, 144) |
| HSL | hsl(212, 39%, 41%) |
| OKLCH | oklch(49.8% 0.082 252.5) |
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 #3F6590 | 6.04:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #3F6590 | 3.47:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #3F6590 text on white | 6.04:1 | AA | Lc 80.1 | Fine for body text |
| #3F6590 text on black | 3.47:1 | AA large text | Lc -21.8 | 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
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#85A4C8
oklch(70.8% 0.063 252.5)
-
Step 500
500
#658DB9
oklch(63.2% 0.08 251.5)
-
Step 600
600
#4C76A6
oklch(55.6% 0.089 252.7)
-
Step 700
700 (this color)
#3F6590
oklch(49.8% 0.082 252.5)
-
Step 800
800
#335173
oklch(42.7% 0.067 252.5)
-
Step 900
900
#2D435D
oklch(37.7% 0.053 253.2)
-
Step 950
950
#1A2736
oklch(26.8% 0.033 252.6)
#3F6590 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) | #536792 | 0.026 |
| Deuteranopia (no green cones) | #495F8F | 0.019 |
| Tritanopia (no blue cones) | #086F74 | 0.072 |
| Achromatopsia (no color) | #636363 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6590
#3F6590
oklch(49.8% 0.082 252.5)
- #7F5B28
#7F5B28
oklch(49.9% 0.082 73.3)
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 #3F6590, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.010
- Dusky Blue #475F94 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.032
- Peacock Blue #016795 ΔE 0.037
- Muted Blue #3B719F ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.040
- Ocean Blue #03719C ΔE 0.044
- YInMn Blue #415A77 ΔE 0.046
Use #3F6590 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.