#3F608B
Closest named color: Denim (#3B638C). oklch(48.3% 0.08 255.5), rgb(63, 96, 139).
Aa
White text reads best on this color (6.44:1).
About this color
#3F608B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.080 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.009 away. White text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #3F608B |
| RGB | rgb(63, 96, 139) |
| HSL | hsl(214, 38%, 40%) |
| OKLCH | oklch(48.3% 0.08 255.5) |
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 #3F608B | 6.44:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #3F608B | 3.25:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #3F608B text on white | 6.44:1 | AA | Lc 81.9 | Fine for body text |
| #3F608B text on black | 3.25:1 | AA large text | Lc -20.0 | 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
#87A3C7
oklch(70.7% 0.062 254.9)
-
Step 500
500
#698CB9
oklch(63.2% 0.079 255)
-
Step 600
600
#5175A5
oklch(55.6% 0.086 255.9)
-
Step 700
700 (this color)
#3F608B
oklch(48.3% 0.08 255.5)
-
Step 800
800
#365073
oklch(42.7% 0.067 256.1)
-
Step 900
900
#2F435D
oklch(37.8% 0.052 255.3)
-
Step 950
950
#1C2736
oklch(27% 0.032 256.3)
#3F608B 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) | #4F628D | 0.022 |
| Deuteranopia (no green cones) | #455B8A | 0.015 |
| Tritanopia (no blue cones) | #156A6F | 0.071 |
| Achromatopsia (no color) | #5E5E5E | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F608B
#3F608B
oklch(48.3% 0.08 255.5)
- #795825
#795825
oklch(48.5% 0.08 75.6)
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 #3F608B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.009
- Dusky Blue #475F94 ΔE 0.019
- Denim Blue #3B5B92 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.028
- YInMn Blue #415A77 ΔE 0.033
- Dusk #4E5481 ΔE 0.037
- Peacock Blue #016795 ΔE 0.040
- Dusty Grape #545775 ΔE 0.044
Use #3F608B 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.