#4288F7
Closest named color: Dodger Blue (#1E90FF). oklch(63.9% 0.181 259.3), rgb(66, 136, 247).
Aa
Black text reads best on this color (6.09:1).
About this color
#4288F7 is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.181 and its hue 259°. 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 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #4288F7 |
| RGB | rgb(66, 136, 247) |
| HSL | hsl(217, 92%, 61%) |
| OKLCH | oklch(63.9% 0.181 259.3) |
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 #4288F7 | 3.44:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #4288F7 | 6.09:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #4288F7 text on white | 3.44:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #4288F7 text on black | 6.09:1 | AA | Lc -40.1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9FC2FA
oklch(80.9% 0.088 259.7)
-
Step 400
400
#69A0F8
oklch(70.6% 0.142 259.4)
-
Step 500
500 (this color)
#4288F7
oklch(63.9% 0.181 259.3)
-
Step 600
600
#1D6CE3
oklch(55.6% 0.196 259.4)
-
Step 700
700
#0E59C5
oklch(49% 0.182 259.4)
-
Step 800
800
#104AA0
oklch(42.8% 0.151 259.2)
-
Step 900
900
#163F7F
oklch(37.8% 0.118 259.3)
-
Step 950
950
#0E254A
oklch(26.9% 0.075 259.5)
#4288F7 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) | #4E93FB | 0.032 |
| Deuteranopia (no green cones) | #2782F5 | 0.026 |
| Tritanopia (no blue cones) | #00A2B3 | 0.142 |
| Achromatopsia (no color) | #8A8A8A | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4288F7
#4288F7
oklch(63.9% 0.181 259.3)
- #B68100
#B68100
oklch(64% 0.133 79.6)
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 #4288F7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.035
- Soft Blue #6488EA ΔE 0.037
- Chefchaouen Blue #4895EF ΔE 0.039
- Clear Blue #247AFD ΔE 0.045
- Cornflower #6A79F7 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.053
- Water Blue #0E87CC ΔE 0.073
Use #4288F7 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.