#3E9BE4
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.7% 0.139 245.9), rgb(62, 155, 228).
Aa
Black text reads best on this color (7.01:1).
About this color
#3E9BE4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.139 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.026 away. Black text reads best on it, at 7.01:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.01:1 |
| White text | 2.99:1 |
Values
| HEX | #3E9BE4 |
| RGB | rgb(62, 155, 228) |
| HSL | hsl(206, 75%, 57%) |
| OKLCH | oklch(66.7% 0.139 245.9) |
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 #3E9BE4 | 2.99:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #3E9BE4 | 7.01:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #3E9BE4 text on white | 2.99:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #3E9BE4 text on black | 7.01:1 | AAA | Lc -45.5 | 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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF7
oklch(93.7% 0.02 245.6)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9DC6EA
oklch(81% 0.067 245.3)
-
Step 400
400
#64A7E0
oklch(70.7% 0.108 245.8)
-
Step 500
500 (this color)
#3E9BE4
oklch(66.7% 0.139 245.9)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005387
oklch(42.8% 0.11 245.8)
-
Step 900
900
#09456E
oklch(37.8% 0.09 245.4)
-
Step 950
950
#0A2941
oklch(27.2% 0.057 245.8)
#3E9BE4 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) | #7A9EE7 | 0.058 |
| Deuteranopia (no green cones) | #628EE3 | 0.042 |
| Tritanopia (no blue cones) | #00ADB5 | 0.101 |
| Achromatopsia (no color) | #959595 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E9BE4
#3E9BE4
oklch(66.7% 0.139 245.9)
- #CD801F
#CD801F
oklch(66.7% 0.139 65.7)
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 #3E9BE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.035
- Cornflower Blue #6495ED ΔE 0.038
- Dodger Blue #1E90FF ΔE 0.057
- Soft Blue #6488EA ΔE 0.059
- Faded Blue #658CBB ΔE 0.068
- Water Blue #0E87CC ΔE 0.069
- Cool Blue #4984B8 ΔE 0.081
Use #3E9BE4 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.