#3F89ED
Closest named color: Dark Sky Blue (#448EE4). oklch(63.3% 0.167 256.9), rgb(63, 137, 237).
Aa
Black text reads best on this color (6.01:1).
About this color
#3F89ED is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.167 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.021 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #3F89ED |
| RGB | rgb(63, 137, 237) |
| HSL | hsl(214, 83%, 59%) |
| OKLCH | oklch(63.3% 0.167 256.9) |
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 #3F89ED | 3.49:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #3F89ED | 6.01:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #3F89ED text on white | 3.49:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #3F89ED text on black | 6.01:1 | AA | Lc -39.6 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#69A2F1
oklch(70.7% 0.131 256.8)
-
Step 500
500 (this color)
#3F89ED
oklch(63.3% 0.167 256.9)
-
Step 600
600
#186FDB
oklch(55.5% 0.183 257.1)
-
Step 700
700
#075DBE
oklch(49.2% 0.169 256.8)
-
Step 800
800
#0D4C99
oklch(42.6% 0.14 256.9)
-
Step 900
900
#15407A
oklch(37.6% 0.109 257.2)
-
Step 950
950
#0E2647
oklch(27% 0.068 257.1)
#3F89ED 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) | #5892F1 | 0.035 |
| Deuteranopia (no green cones) | #3982EB | 0.020 |
| Tritanopia (no blue cones) | #00A0AF | 0.129 |
| Achromatopsia (no color) | #898989 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F89ED
#3F89ED
oklch(63.3% 0.167 256.9)
- #B67D00
#B67D00
oklch(63.2% 0.132 76.8)
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 #3F89ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.021
- Dodger Blue #1E90FF ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.034
- Soft Blue #6488EA ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.050
- Clear Blue #247AFD ΔE 0.053
- Water Blue #0E87CC ΔE 0.058
- Cornflower #6A79F7 ΔE 0.058
Use #3F89ED 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.