#3F54A1
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.127 269.6), rgb(63, 84, 161).
Aa
White text reads best on this color (7.01:1).
About this color
#3F54A1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.127 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.034 away. White text reads best on it, at 7.01:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #3F54A1 |
| RGB | rgb(63, 84, 161) |
| HSL | hsl(227, 44%, 44%) |
| OKLCH | oklch(47% 0.127 269.6) |
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 #3F54A1 | 7.01:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #3F54A1 | 2.99:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #3F54A1 text on white | 7.01:1 | AAA | Lc 84.1 | Fine for body text |
| #3F54A1 text on black | 2.99:1 | Fails | Lc -17.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B1C0E9
oklch(81% 0.06 269.3)
-
Step 400
400
#889EDE
oklch(70.7% 0.097 269.3)
-
Step 500
500
#6B84D5
oklch(63% 0.126 269.6)
-
Step 600
600
#546DC2
oklch(55.7% 0.135 269.3)
-
Step 700
700 (this color)
#3F54A1
oklch(47% 0.127 269.6)
-
Step 800
800
#384A88
oklch(42.7% 0.105 269.4)
-
Step 900
900
#303E6D
oklch(37.6% 0.083 269.6)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#3F54A1 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) | #2F5EA4 | 0.029 |
| Deuteranopia (no green cones) | #1E559F | 0.032 |
| Tritanopia (no blue cones) | #006572 | 0.110 |
| Achromatopsia (no color) | #595959 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F54A1
#3F54A1
oklch(47% 0.127 269.6)
- #705700
#705700
oklch(46.9% 0.096 89.3)
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 #3F54A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.034
- Twilight #4E518B ΔE 0.039
- Dusky Blue #475F94 ΔE 0.043
- Dusk Blue #26538D ΔE 0.044
- Blueberry #464196 ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.051
- Dusk #4E5481 ΔE 0.055
- Cobalt #1E488F ΔE 0.059
Use #3F54A1 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.