#3F93FA
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.3% 0.173 255.4), rgb(63, 147, 250).
Aa
Black text reads best on this color (6.76:1).
About this color
#3F93FA is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.173 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.019 away. Black text reads best on it, at 6.76:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.76:1 |
| White text | 3.10:1 |
Values
| HEX | #3F93FA |
| RGB | rgb(63, 147, 250) |
| HSL | hsl(213, 95%, 61%) |
| OKLCH | oklch(66.3% 0.173 255.4) |
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 #3F93FA | 3.10:1 | AA large text | Lc -63.0 | Content text, not long reading |
| Black text on #3F93FA | 6.76:1 | AA | Lc 46.4 | Large or bold text, headings |
| #3F93FA text on white | 3.10:1 | AA large text | Lc 57.6 | Large or bold text, headings |
| #3F93FA text on black | 6.76:1 | AA | Lc -44.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC4F7
oklch(81% 0.084 254.7)
-
Step 400
400
#64A3F3
oklch(70.8% 0.135 255.1)
-
Step 500
500 (this color)
#3F93FA
oklch(66.3% 0.173 255.4)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#0D417C
oklch(37.8% 0.113 255.2)
-
Step 950
950
#0A2648
oklch(26.9% 0.072 255.3)
#3F93FA 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) | #619BFE | 0.039 |
| Deuteranopia (no green cones) | #408AF8 | 0.023 |
| Tritanopia (no blue cones) | #00ABBA | 0.133 |
| Achromatopsia (no color) | #929292 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F93FA
#3F93FA
oklch(66.3% 0.173 255.4)
- #C48500
#C48500
oklch(66.4% 0.14 75.5)
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 #3F93FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.019
- Dodger Blue #1E90FF ΔE 0.021
- Dark Sky Blue #448EE4 ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.038
- Soft Blue #6488EA ΔE 0.042
- Clear Blue #247AFD ΔE 0.070
- Cornflower #6A79F7 ΔE 0.071
- Water Blue #0E87CC ΔE 0.080
Use #3F93FA 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.