#3F53A4
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.132 270.2), rgb(63, 83, 164).
Aa
White text reads best on this color (7.03:1).
About this color
#3F53A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.132 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.040 away. White text reads best on it, at 7.03:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #3F53A4 |
| RGB | rgb(63, 83, 164) |
| HSL | hsl(228, 44%, 45%) |
| OKLCH | oklch(47% 0.132 270.2) |
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 #3F53A4 | 7.03:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #3F53A4 | 2.98:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #3F53A4 text on white | 7.03:1 | AAA | Lc 84.1 | Fine for body text |
| #3F53A4 text on black | 2.98:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0BFEB
oklch(80.8% 0.065 270.2)
-
Step 400
400
#889DE1
oklch(70.7% 0.103 270.5)
-
Step 500
500
#6B84D8
oklch(63.2% 0.13 269.9)
-
Step 600
600
#546CC6
oklch(55.7% 0.142 270.1)
-
Step 700
700 (this color)
#3F53A4
oklch(47% 0.132 270.2)
-
Step 800
800
#38498A
oklch(42.6% 0.109 270.2)
-
Step 900
900
#303E6F
oklch(37.7% 0.086 269.9)
-
Step 950
950
#1C2541
oklch(27.1% 0.054 269.1)
#3F53A4 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) | #295DA7 | 0.032 |
| Deuteranopia (no green cones) | #1654A2 | 0.037 |
| Tritanopia (no blue cones) | #006573 | 0.114 |
| Achromatopsia (no color) | #595959 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F53A4
#3F53A4
oklch(47% 0.132 270.2)
- #6F5800
#6F5800
oklch(47% 0.096 91.1)
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 #3F53A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.040
- Twilight #4E518B ΔE 0.044
- Dusk Blue #26538D ΔE 0.048
- Dusky Blue #475F94 ΔE 0.048
- Blueberry #464196 ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.056
- Cobalt #1E488F ΔE 0.060
- Dusk #4E5481 ΔE 0.061
Use #3F53A4 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.