#339FE8
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.6% 0.144 243.3), rgb(51, 159, 232).
Aa
Black text reads best on this color (7.26:1).
About this color
#339FE8 is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.144 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.032 away. Black text reads best on it, at 7.26:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.26:1 |
| White text | 2.89:1 |
Values
| HEX | #339FE8 |
| RGB | rgb(51, 159, 232) |
| HSL | hsl(204, 80%, 55%) |
| OKLCH | oklch(67.6% 0.144 243.3) |
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 #339FE8 | 2.89:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #339FE8 | 7.26:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #339FE8 text on white | 2.89:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #339FE8 text on black | 7.26:1 | AAA | Lc -47.0 | 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
#BEDEF8
oklch(88.6% 0.049 242.8)
-
Step 300
300
#8DC8F7
oklch(81% 0.09 243.2)
-
Step 400
400 (this color)
#339FE8
oklch(67.6% 0.144 243.3)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#339FE8 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) | #7DA1EB | 0.065 |
| Deuteranopia (no green cones) | #6490E7 | 0.051 |
| Tritanopia (no blue cones) | #00B1B9 | 0.100 |
| Achromatopsia (no color) | #989898 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #339FE8
#339FE8
oklch(67.6% 0.144 243.3)
- #D4801F
#D4801F
oklch(67.5% 0.144 63)
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 #339FE8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.032
- Cornflower Blue #6495ED ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.059
- Soft Blue #6488EA ΔE 0.068
- Water Blue #0E87CC ΔE 0.077
- Faded Blue #658CBB ΔE 0.078
- Turquoise Blue #06B1C4 ΔE 0.085
Use #339FE8 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.