#3F93CE
Closest named color: Dark Sky Blue (#448EE4). oklch(63.8% 0.12 242.6), rgb(63, 147, 206).
Aa
Black text reads best on this color (6.27:1).
About this color
#3F93CE is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.120 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.039 away. Black text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #3F93CE |
| RGB | rgb(63, 147, 206) |
| HSL | hsl(205, 59%, 53%) |
| OKLCH | oklch(63.8% 0.12 242.6) |
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 #3F93CE | 3.34:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #3F93CE | 6.27:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #3F93CE text on white | 3.34:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #3F93CE text on black | 6.27:1 | AA | Lc -41.1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF5
oklch(93.7% 0.017 242.4)
-
Step 200
200
#C7DCED
oklch(88.4% 0.033 242.4)
-
Step 300
300
#A0C6E4
oklch(80.9% 0.059 242.2)
-
Step 400
400
#6AA8D6
oklch(70.8% 0.093 241.9)
-
Step 500
500 (this color)
#3F93CE
oklch(63.8% 0.12 242.6)
-
Step 600
600
#0B7AB9
oklch(55.6% 0.131 242.7)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#055481
oklch(42.8% 0.1 242.5)
-
Step 900
900
#134667
oklch(37.8% 0.077 241.9)
-
Step 950
950
#0D293D
oklch(27% 0.05 242.9)
#3F93CE 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) | #7894D1 | 0.057 |
| Deuteranopia (no green cones) | #6486CD | 0.045 |
| Tritanopia (no blue cones) | #00A1A8 | 0.084 |
| Achromatopsia (no color) | #8C8C8C | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F93CE
#3F93CE
oklch(63.8% 0.12 242.6)
- #BE7A34
#BE7A34
oklch(63.8% 0.12 63.2)
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 #3F93CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.039
- Faded Blue #658CBB ΔE 0.042
- Water Blue #0E87CC ΔE 0.045
- Cool Blue #4984B8 ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.051
- Steel Blue #4682B4 ΔE 0.054
- Blue NCS #118AB2 ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.055
Use #3F93CE 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.