#3FA2E9
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.6% 0.139 243.8), rgb(63, 162, 233).
Aa
Black text reads best on this color (7.55:1).
About this color
#3FA2E9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.139 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.038 away. Black text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.55:1 |
| White text | 2.77:1 |
Values
| HEX | #3FA2E9 |
| RGB | rgb(63, 162, 233) |
| HSL | hsl(205, 79%, 58%) |
| OKLCH | oklch(68.6% 0.139 243.8) |
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 #3FA2E9 | 2.77:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #3FA2E9 | 7.55:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #3FA2E9 text on white | 2.77:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #3FA2E9 text on black | 7.55:1 | AAA | Lc -48.6 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFA
oklch(93.5% 0.026 244.4)
-
Step 200
200
#BFDDF7
oklch(88.4% 0.048 244.5)
-
Step 300
300
#90C7F5
oklch(80.8% 0.087 244.4)
-
Step 400
400 (this color)
#3FA2E9
oklch(68.6% 0.139 243.8)
-
Step 500
500
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#0079BC
oklch(55.5% 0.136 243.9)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#3FA2E9 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) | #81A4EC | 0.062 |
| Deuteranopia (no green cones) | #6A94E8 | 0.048 |
| Tritanopia (no blue cones) | #00B3BB | 0.097 |
| Achromatopsia (no color) | #9B9B9B | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA2E9
#3FA2E9
oklch(68.6% 0.139 243.8)
- #D5852C
#D5852C
oklch(68.6% 0.139 63.7)
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 #3FA2E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.067
- Soft Blue #6488EA ΔE 0.072
- Deep Sky Blue #00BFFF ΔE 0.077
- Faded Blue #658CBB ΔE 0.081
- Turquoise Blue #06B1C4 ΔE 0.081
Use #3FA2E9 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.