#3391E2
Closest named color: Dark Sky Blue (#448EE4). oklch(64.1% 0.149 248.7), rgb(51, 145, 226).
Aa
Black text reads best on this color (6.28:1).
About this color
#3391E2 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.149 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.014 away. Black text reads best on it, at 6.28:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.28:1 |
| White text | 3.33:1 |
Values
| HEX | #3391E2 |
| RGB | rgb(51, 145, 226) |
| HSL | hsl(208, 75%, 54%) |
| OKLCH | oklch(64.1% 0.149 248.7) |
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 #3391E2 | 3.33:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #3391E2 | 6.28:1 | AA | Lc 43.7 | Non-text elements, placeholder text |
| #3391E2 text on white | 3.33:1 | AA large text | Lc 60.4 | Content text, not long reading |
| #3391E2 text on black | 6.28:1 | AA | Lc -41.3 | 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
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9CC5EE
oklch(80.8% 0.073 248.7)
-
Step 400
400
#63A6E6
oklch(70.7% 0.117 248.8)
-
Step 500
500 (this color)
#3391E2
oklch(64.1% 0.149 248.7)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#084472
oklch(37.7% 0.097 248.3)
-
Step 950
950
#092843
oklch(27% 0.062 248.7)
#3391E2 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) | #6B95E5 | 0.051 |
| Deuteranopia (no green cones) | #5185E0 | 0.036 |
| Tritanopia (no blue cones) | #00A4AF | 0.108 |
| Achromatopsia (no color) | #8D8D8D | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3391E2
#3391E2
oklch(64.1% 0.149 248.7)
- #C27A00
#C27A00
oklch(64.1% 0.14 69.1)
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 #3391E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.014
- Chefchaouen Blue #4895EF ΔE 0.027
- Dodger Blue #1E90FF ΔE 0.044
- Water Blue #0E87CC ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.047
- Soft Blue #6488EA ΔE 0.048
- Cool Blue #4984B8 ΔE 0.066
- Faded Blue #658CBB ΔE 0.067
Use #3391E2 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.