#339CEB
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.1% 0.15 245.9), rgb(51, 156, 235).
Aa
Black text reads best on this color (7.09:1).
About this color
#339CEB is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.150 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.023 away. Black text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.09:1 |
| White text | 2.95:1 |
Values
| HEX | #339CEB |
| RGB | rgb(51, 156, 235) |
| HSL | hsl(206, 82%, 56%) |
| OKLCH | oklch(67.1% 0.15 245.9) |
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 #339CEB | 2.95:1 | Fails | Lc -61.0 | Content text, not long reading |
| Black text on #339CEB | 7.09:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #339CEB text on white | 2.95:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #339CEB text on black | 7.09:1 | AAA | Lc -46.1 | 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
#8DC7FA
oklch(80.9% 0.094 245.8)
-
Step 400
400 (this color)
#339CEB
oklch(67.1% 0.15 245.9)
-
Step 500
500
#008FE4
oklch(63% 0.162 246)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005387
oklch(42.8% 0.11 245.8)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950
#002846
oklch(26.9% 0.07 246.6)
#339CEB 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) | #779FEE | 0.060 |
| Deuteranopia (no green cones) | #5D8EE9 | 0.044 |
| Tritanopia (no blue cones) | #00AFB9 | 0.105 |
| Achromatopsia (no color) | #969696 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #339CEB
#339CEB
oklch(67.1% 0.15 245.9)
- #D27F00
#D27F00
oklch(67% 0.15 65.7)
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 #339CEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.023
- Dark Sky Blue #448EE4 ΔE 0.037
- Cornflower Blue #6495ED ΔE 0.040
- Dodger Blue #1E90FF ΔE 0.049
- Soft Blue #6488EA ΔE 0.060
- Water Blue #0E87CC ΔE 0.073
- Faded Blue #658CBB ΔE 0.079
- Cool Blue #4984B8 ΔE 0.089
Use #339CEB 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.