#339FEE
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.9% 0.151 245.3), rgb(51, 159, 238).
Aa
Black text reads best on this color (7.33:1).
About this color
#339FEE is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.151 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.028 away. Black text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.33:1 |
| White text | 2.86:1 |
Values
| HEX | #339FEE |
| RGB | rgb(51, 159, 238) |
| HSL | hsl(205, 85%, 57%) |
| OKLCH | oklch(67.9% 0.151 245.3) |
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 #339FEE | 2.86:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #339FEE | 7.33:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #339FEE text on white | 2.86:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #339FEE text on black | 7.33:1 | AAA | Lc -47.5 | 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 400.
-
Step 50
50
#EFF7FE
oklch(97.2% 0.013 244.3)
-
Step 100
100
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BDDEFA
oklch(88.6% 0.052 244)
-
Step 300
300
#8CC7FA
oklch(80.8% 0.095 245.4)
-
Step 400
400 (this color)
#339FEE
oklch(67.9% 0.151 245.3)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950
#002945
oklch(27.1% 0.068 244.5)
#339FEE 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) | #7AA2F1 | 0.062 |
| Deuteranopia (no green cones) | #5F91ED | 0.045 |
| Tritanopia (no blue cones) | #00B2BB | 0.106 |
| Achromatopsia (no color) | #999999 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #339FEE
#339FEE
oklch(67.9% 0.151 245.3)
- #D68106
#D68106
oklch(67.9% 0.151 65.1)
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 #339FEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.028
- Cornflower Blue #6495ED ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.053
- Soft Blue #6488EA ΔE 0.066
- Water Blue #0E87CC ΔE 0.081
- Deep Sky Blue #00BFFF ΔE 0.085
- Faded Blue #658CBB ΔE 0.085
Use #339FEE 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.