#439CFC
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.5% 0.165 252.9), rgb(67, 156, 252).
Aa
Black text reads best on this color (7.39:1).
About this color
#439CFC is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.165 and its hue 253°. 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 7.39:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.39:1 |
| White text | 2.83:1 |
Values
| HEX | #439CFC |
| RGB | rgb(67, 156, 252) |
| HSL | hsl(211, 97%, 63%) |
| OKLCH | oklch(68.5% 0.165 252.9) |
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 #439CFC | 2.83:1 | Fails | Lc -59.3 | Large or bold text, headings |
| Black text on #439CFC | 7.39:1 | AAA | Lc 50.0 | Large or bold text, headings |
| #439CFC text on white | 2.83:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #439CFC text on black | 7.39:1 | AAA | Lc -47.8 | 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
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DCECFE
oklch(93.7% 0.03 251.3)
-
Step 200
200
#BFDCFF
oklch(88.5% 0.058 253.3)
-
Step 300
300
#93C5FF
oklch(81% 0.098 252.7)
-
Step 400
400 (this color)
#439CFC
oklch(68.5% 0.165 252.9)
-
Step 500
500
#0089FA
oklch(63.1% 0.195 253)
-
Step 600
600
#0073D3
oklch(55.6% 0.171 252.9)
-
Step 700
700
#0061B3
oklch(49.2% 0.151 252.8)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900
#00417C
oklch(37.6% 0.116 253)
-
Step 950
950
#00264D
oklch(26.9% 0.083 253)
#439CFC 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) | #6FA3FF | 0.046 |
| Deuteranopia (no green cones) | #5292FA | 0.026 |
| Tritanopia (no blue cones) | #00B3C0 | 0.126 |
| Achromatopsia (no color) | #999999 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #439CFC
#439CFC
oklch(68.5% 0.165 252.9)
- #CF8900
#CF8900
oklch(68.5% 0.146 73.2)
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 #439CFC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.047
- Soft Blue #6488EA ΔE 0.056
- Periwinkle Blue #8F99FB ΔE 0.077
- Lavender Blue #8B88F8 ΔE 0.084
- Perrywinkle #8F8CE7 ΔE 0.086
Use #439CFC 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.