#4399D2
Closest named color: Dark Sky Blue (#448EE4). oklch(65.5% 0.118 241), rgb(67, 153, 210).
Aa
Black text reads best on this color (6.72:1).
About this color
#4399D2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.118 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.045 away. Black text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.72:1 |
| White text | 3.12:1 |
Values
| HEX | #4399D2 |
| RGB | rgb(67, 153, 210) |
| HSL | hsl(204, 61%, 54%) |
| OKLCH | oklch(65.5% 0.118 241) |
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 #4399D2 | 3.12:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #4399D2 | 6.72:1 | AA | Lc 46.1 | Large or bold text, headings |
| #4399D2 text on white | 3.12:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #4399D2 text on black | 6.72:1 | AA | Lc -43.8 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DCED
oklch(88.4% 0.033 242.4)
-
Step 300
300
#A0C6E3
oklch(80.9% 0.058 241.3)
-
Step 400
400
#69A8D5
oklch(70.7% 0.093 240.9)
-
Step 500
500 (this color)
#4399D2
oklch(65.5% 0.118 241)
-
Step 600
600
#037BB7
oklch(55.7% 0.129 240.8)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#015480
oklch(42.7% 0.1 241.4)
-
Step 900
900
#114666
oklch(37.7% 0.077 240.5)
-
Step 950
950
#0D293C
oklch(27% 0.049 241.5)
#4399D2 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) | #7F99D5 | 0.061 |
| Deuteranopia (no green cones) | #6B8CD1 | 0.048 |
| Tritanopia (no blue cones) | #00A7AD | 0.083 |
| Achromatopsia (no color) | #929292 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4399D2
#4399D2
oklch(65.5% 0.118 241)
- #C47E3D
#C47E3D
oklch(65.4% 0.118 61)
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 #4399D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.045
- Faded Blue #658CBB ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.055
- Water Blue #0E87CC ΔE 0.061
- Cool Blue #4984B8 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.067
- Blue NCS #118AB2 ΔE 0.068
Use #4399D2 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.