#3FA9E4
Closest named color: Chefchaouen Blue (#4895EF). oklch(70% 0.129 237.4), rgb(63, 169, 228).
Aa
Black text reads best on this color (8.00:1).
About this color
#3FA9E4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.129 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.060 away. Black text reads best on it, at 8.00:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 8.00:1 |
| White text | 2.62:1 |
Values
| HEX | #3FA9E4 |
| RGB | rgb(63, 169, 228) |
| HSL | hsl(201, 75%, 57%) |
| OKLCH | oklch(70% 0.129 237.4) |
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 #3FA9E4 | 2.62:1 | Fails | Lc -55.9 | Large or bold text, headings |
| Black text on #3FA9E4 | 8.00:1 | AAA | Lc 53.2 | Large or bold text, headings |
| #3FA9E4 text on white | 2.62:1 | Fails | Lc 50.8 | Large or bold text, headings |
| #3FA9E4 text on black | 8.00:1 | AAA | Lc -51.1 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DCEDF8
oklch(93.7% 0.023 236)
-
Step 200
200
#BEDEF3
oklch(88.4% 0.045 236.8)
-
Step 300
300
#8FC9EF
oklch(81% 0.08 237.8)
-
Step 400
400 (this color)
#3FA9E4
oklch(70% 0.129 237.4)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#3FA9E4 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) | #8DA9E7 | 0.073 |
| Deuteranopia (no green cones) | #7799E3 | 0.060 |
| Tritanopia (no blue cones) | #00B8BD | 0.084 |
| Achromatopsia (no color) | #A0A0A0 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA9E4
#3FA9E4
oklch(70% 0.129 237.4)
- #DA8846
#DA8846
oklch(70% 0.129 57.2)
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 #3FA9E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.060
- Deep Sky Blue #00BFFF ΔE 0.063
- Cornflower Blue #6495ED ΔE 0.063
- Turquoise Blue #06B1C4 ΔE 0.063
- Dark Sky Blue #448EE4 ΔE 0.074
- Greyblue #77A1B5 ΔE 0.077
- Faded Blue #658CBB ΔE 0.088
- Dodger Blue #1E90FF ΔE 0.089
Use #3FA9E4 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.