#4290FC
Closest named color: Dodger Blue (#1E90FF). oklch(65.9% 0.178 257.3), rgb(66, 144, 252).
Aa
Black text reads best on this color (6.62:1).
About this color
#4290FC is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.178 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.019 away. Black text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.62:1 |
| White text | 3.16:1 |
Values
| HEX | #4290FC |
| RGB | rgb(66, 144, 252) |
| HSL | hsl(215, 97%, 62%) |
| OKLCH | oklch(65.9% 0.178 257.3) |
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 #4290FC | 3.16:1 | AA large text | Lc -63.8 | Content text, not long reading |
| Black text on #4290FC | 6.62:1 | AA | Lc 45.6 | Large or bold text, headings |
| #4290FC text on white | 3.16:1 | AA large text | Lc 58.4 | Large or bold text, headings |
| #4290FC text on black | 6.62:1 | AA | Lc -43.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#66A2F6
oklch(70.8% 0.139 257)
-
Step 500
500 (this color)
#4290FC
oklch(65.9% 0.178 257.3)
-
Step 600
600
#0C6EE1
oklch(55.6% 0.193 257.2)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#054B9E
oklch(42.7% 0.149 257.3)
-
Step 900
900
#11407E
oklch(37.8% 0.116 257.2)
-
Step 950
950
#0C2649
oklch(27% 0.072 256.9)
#4290FC 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) | #5A9AFF | 0.036 |
| Deuteranopia (no green cones) | #3789FA | 0.021 |
| Tritanopia (no blue cones) | #00A9BA | 0.137 |
| Achromatopsia (no color) | #919191 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4290FC
#4290FC
oklch(65.9% 0.178 257.3)
- #C08500
#C08500
oklch(65.9% 0.138 77.4)
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 #4290FC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.019
- Chefchaouen Blue #4895EF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.036
- Soft Blue #6488EA ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.042
- Clear Blue #247AFD ΔE 0.063
- Cornflower #6A79F7 ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.078
Use #4290FC 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.