#4399DD
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.1% 0.131 245.6), rgb(67, 153, 221).
Aa
Black text reads best on this color (6.83:1).
About this color
#4399DD is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.131 and its hue 246°. 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 6.83:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.83:1 |
| White text | 3.07:1 |
Values
| HEX | #4399DD |
| RGB | rgb(67, 153, 221) |
| HSL | hsl(206, 69%, 56%) |
| OKLCH | oklch(66.1% 0.131 245.6) |
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 #4399DD | 3.07:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #4399DD | 6.83:1 | AA | Lc 46.8 | Large or bold text, headings |
| #4399DD text on white | 3.07:1 | AA large text | Lc 57.3 | Large or bold text, headings |
| #4399DD text on black | 6.83:1 | AA | Lc -44.5 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#9FC6E8
oklch(81% 0.064 245)
-
Step 400
400
#68A7DC
oklch(70.7% 0.102 245.3)
-
Step 500
500 (this color)
#4399DD
oklch(66.1% 0.131 245.6)
-
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
#10456C
oklch(37.8% 0.086 245.7)
-
Step 950
950
#0C293F
oklch(27.1% 0.054 244.7)
#4399DD 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) | #7A9BE0 | 0.055 |
| Deuteranopia (no green cones) | #658CDC | 0.043 |
| Tritanopia (no blue cones) | #00A9B1 | 0.095 |
| Achromatopsia (no color) | #939393 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4399DD
#4399DD
oklch(66.1% 0.131 245.6)
- #C8802B
#C8802B
oklch(66.1% 0.131 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 #4399DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.041
- Faded Blue #658CBB ΔE 0.058
- Soft Blue #6488EA ΔE 0.058
- Water Blue #0E87CC ΔE 0.063
- Dodger Blue #1E90FF ΔE 0.064
- Cool Blue #4984B8 ΔE 0.071
Use #4399DD 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.