#428CFE
Closest named color: Dodger Blue (#1E90FF). oklch(65.1% 0.185 259), rgb(66, 140, 254).
Aa
Black text reads best on this color (6.41:1).
About this color
#428CFE is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.185 and its hue 259°. 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 6.41:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.41:1 |
| White text | 3.27:1 |
Values
| HEX | #428CFE |
| RGB | rgb(66, 140, 254) |
| HSL | hsl(216, 99%, 63%) |
| OKLCH | oklch(65.1% 0.185 259) |
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 #428CFE | 3.27:1 | AA large text | Lc -65.1 | Content text, not long reading |
| Black text on #428CFE | 6.41:1 | AA | Lc 44.4 | Non-text elements, placeholder text |
| #428CFE text on white | 3.27:1 | AA large text | Lc 59.6 | Large or bold text, headings |
| #428CFE text on black | 6.41:1 | AA | Lc -42.1 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9DC2FB
oklch(80.8% 0.091 258.9)
-
Step 400
400
#67A0FA
oklch(70.6% 0.146 259.2)
-
Step 500
500 (this color)
#428CFE
oklch(65.1% 0.185 259)
-
Step 600
600
#156CE6
oklch(55.7% 0.201 258.9)
-
Step 700
700
#0459C8
oklch(49.1% 0.187 259)
-
Step 800
800
#0B49A1
oklch(42.6% 0.155 259.1)
-
Step 900
900
#133F80
oklch(37.8% 0.12 258.7)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#428CFE 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) | #5197FF | 0.033 |
| Deuteranopia (no green cones) | #2686FC | 0.025 |
| Tritanopia (no blue cones) | #00A7B9 | 0.144 |
| Achromatopsia (no color) | #8E8E8E | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428CFE
#428CFE
oklch(65.1% 0.185 259)
- #BB8400
#BB8400
oklch(65.1% 0.135 79.2)
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 #428CFE, 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 0.036
- Dark Sky Blue #448EE4 ΔE 0.040
- Soft Blue #6488EA ΔE 0.041
- Cornflower Blue #6495ED ΔE 0.050
- Clear Blue #247AFD ΔE 0.053
- Cornflower #6A79F7 ΔE 0.056
- Lavender Blue #8B88F8 ΔE 0.079
Use #428CFE 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.