#339CEA
Closest named color: Chefchaouen Blue (#4895EF). oklch(67% 0.149 245.6), rgb(51, 156, 234).
Aa
Black text reads best on this color (7.08:1).
About this color
#339CEA is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.149 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.024 away. Black text reads best on it, at 7.08:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #339CEA |
| RGB | rgb(51, 156, 234) |
| HSL | hsl(206, 81%, 56%) |
| OKLCH | oklch(67% 0.149 245.6) |
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 #339CEA | 2.96:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #339CEA | 7.08:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #339CEA text on white | 2.96:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #339CEA text on black | 7.08:1 | AAA | Lc -46.0 | 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
#EFF7FE
oklch(97.2% 0.013 244.3)
-
Step 100
100
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BEDDFA
oklch(88.4% 0.052 246.6)
-
Step 300
300
#8EC7F9
oklch(80.9% 0.092 245.7)
-
Step 400
400 (this color)
#339CEA
oklch(67% 0.149 245.6)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950
#002946
oklch(27.2% 0.069 245.4)
#339CEA 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) | #789FED | 0.061 |
| Deuteranopia (no green cones) | #5E8EE9 | 0.045 |
| Tritanopia (no blue cones) | #00AFB8 | 0.105 |
| Achromatopsia (no color) | #969696 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #339CEA
#339CEA
oklch(67% 0.149 245.6)
- #D27F05
#D27F05
oklch(67% 0.149 65.4)
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 #339CEA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.037
- Cornflower Blue #6495ED ΔE 0.041
- Dodger Blue #1E90FF ΔE 0.050
- Soft Blue #6488EA ΔE 0.061
- Water Blue #0E87CC ΔE 0.072
- Faded Blue #658CBB ΔE 0.078
- Cool Blue #4984B8 ΔE 0.088
Use #339CEA 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.