#3A99E8
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.4% 0.147 247.6), rgb(58, 153, 232).
Aa
Black text reads best on this color (6.90:1).
About this color
#3A99E8 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.147 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.019 away. Black text reads best on it, at 6.90:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.90:1 |
| White text | 3.04:1 |
Values
| HEX | #3A99E8 |
| RGB | rgb(58, 153, 232) |
| HSL | hsl(207, 79%, 57%) |
| OKLCH | oklch(66.4% 0.147 247.6) |
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 #3A99E8 | 3.04:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #3A99E8 | 6.90:1 | AA | Lc 47.2 | Large or bold text, headings |
| #3A99E8 text on white | 3.04:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #3A99E8 text on black | 6.90:1 | AA | Lc -44.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF7
oklch(93.5% 0.021 248.1)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9CC5ED
oklch(80.8% 0.072 248.1)
-
Step 400
400
#62A6E4
oklch(70.6% 0.115 247.6)
-
Step 500
500 (this color)
#3A99E8
oklch(66.4% 0.147 247.6)
-
Step 600
600
#0077C4
oklch(55.5% 0.148 247.6)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#074471
oklch(37.7% 0.096 247.6)
-
Step 950
950
#092842
oklch(26.9% 0.06 247.8)
#3A99E8 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) | #759DEB | 0.056 |
| Deuteranopia (no green cones) | #5B8DE6 | 0.037 |
| Tritanopia (no blue cones) | #00ACB6 | 0.106 |
| Achromatopsia (no color) | #949494 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A99E8
#3A99E8
oklch(66.4% 0.147 247.6)
- #CD7F00
#CD7F00
oklch(66.4% 0.146 67.7)
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 #3A99E8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.019
- Dark Sky Blue #448EE4 ΔE 0.029
- Cornflower Blue #6495ED ΔE 0.037
- Dodger Blue #1E90FF ΔE 0.048
- Soft Blue #6488EA ΔE 0.054
- Water Blue #0E87CC ΔE 0.067
- Faded Blue #658CBB ΔE 0.073
- Cool Blue #4984B8 ΔE 0.082
Use #3A99E8 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.