#0399FA
Closest named color: Dodger Blue (#1E90FF). oklch(66.6% 0.178 247.8), rgb(3, 153, 250).
Aa
Black text reads best on this color (6.94:1).
About this color
#0399FA is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.178 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.026 away. Black text reads best on it, at 6.94:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.94:1 |
| White text | 3.02:1 |
Values
| HEX | #0399FA |
| RGB | rgb(3, 153, 250) |
| HSL | hsl(204, 98%, 50%) |
| OKLCH | oklch(66.6% 0.178 247.8) |
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 #0399FA | 3.02:1 | AA large text | Lc -61.6 | Content text, not long reading |
| Black text on #0399FA | 6.94:1 | AA | Lc 47.8 | Large or bold text, headings |
| #0399FA text on white | 3.02:1 | AA large text | Lc 56.3 | Large or bold text, headings |
| #0399FA text on black | 6.94:1 | AA | Lc -45.5 | 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 500.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DDECFA
oklch(93.6% 0.025 246.2)
-
Step 200
200
#C1DDF8
oklch(88.6% 0.048 247.4)
-
Step 300
300
#93C6F6
oklch(80.8% 0.087 247.4)
-
Step 400
400
#50A7F2
oklch(70.8% 0.138 247.3)
-
Step 500
500 (this color)
#0399FA
oklch(66.6% 0.178 247.8)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#002847
oklch(27% 0.072 247.4)
#0399FA 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) | #689FFE | 0.061 |
| Deuteranopia (no green cones) | #438BF8 | 0.039 |
| Tritanopia (no blue cones) | #00B1BD | 0.127 |
| Achromatopsia (no color) | #949494 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0399FA
#0399FA
oklch(66.6% 0.178 247.8)
- #CE8000
#CE8000
oklch(66.7% 0.146 67.9)
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 #0399FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.026
- Chefchaouen Blue #4895EF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.053
- Soft Blue #6488EA ΔE 0.064
- Water Blue #0E87CC ΔE 0.078
- Clear Blue #247AFD ΔE 0.080
- Cornflower #6A79F7 ΔE 0.093
Use #0399FA 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.