#3F5987
Closest named color: Denim Blue (#3B5B92). oklch(46.5% 0.082 261.3), rgb(63, 89, 135).
Aa
White text reads best on this color (7.02:1).
About this color
#3F5987 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.082 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.018 away. White text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.99:1 |
| White text | 7.02:1 |
Values
| HEX | #3F5987 |
| RGB | rgb(63, 89, 135) |
| HSL | hsl(218, 36%, 39%) |
| OKLCH | oklch(46.5% 0.082 261.3) |
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 #3F5987 | 7.02:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #3F5987 | 2.99:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #3F5987 text on white | 7.02:1 | AAA | Lc 84.2 | Fine for body text |
| #3F5987 text on black | 2.99:1 | Fails | Lc -17.8 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C1DB
oklch(80.9% 0.04 262.9)
-
Step 400
400
#8BA1C9
oklch(70.6% 0.064 262.3)
-
Step 500
500
#6E8ABB
oklch(63.1% 0.081 261.3)
-
Step 600
600
#5673A7
oklch(55.6% 0.088 261.6)
-
Step 700
700 (this color)
#3F5987
oklch(46.5% 0.082 261.3)
-
Step 800
800
#3A4F74
oklch(42.7% 0.067 261.3)
-
Step 900
900
#32425E
oklch(37.8% 0.053 261.3)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#3F5987 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) | #475D89 | 0.017 |
| Deuteranopia (no green cones) | #3F5686 | 0.009 |
| Tritanopia (no blue cones) | #1C636A | 0.072 |
| Achromatopsia (no color) | #595959 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5987
#3F5987
oklch(46.5% 0.082 261.3)
- #70541B
#70541B
oklch(46.4% 0.082 81.7)
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 #3F5987, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.018
- Light Navy Blue #2E5A88 ΔE 0.018
- Dusk #4E5481 ΔE 0.023
- YInMn Blue #415A77 ΔE 0.028
- Dusky Blue #475F94 ΔE 0.028
- Denim #3B638C ΔE 0.029
- Twilight #4E518B ΔE 0.031
- Dusk Blue #26538D ΔE 0.036
Use #3F5987 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.