#428BF8
Closest named color: Dodger Blue (#1E90FF). oklch(64.6% 0.178 258.5), rgb(66, 139, 248).
Aa
Black text reads best on this color (6.28:1).
About this color
#428BF8 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.178 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.022 away. Black text reads best on it, at 6.28:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.28:1 |
| White text | 3.34:1 |
Values
| HEX | #428BF8 |
| RGB | rgb(66, 139, 248) |
| HSL | hsl(216, 93%, 62%) |
| OKLCH | oklch(64.6% 0.178 258.5) |
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 #428BF8 | 3.34:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #428BF8 | 6.28:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #428BF8 text on white | 3.34:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #428BF8 text on black | 6.28:1 | AA | Lc -41.2 | 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
#9EC2F9
oklch(80.8% 0.088 258.7)
-
Step 400
400
#68A1F7
oklch(70.7% 0.14 258.4)
-
Step 500
500 (this color)
#428BF8
oklch(64.6% 0.178 258.5)
-
Step 600
600
#186DE2
oklch(55.6% 0.194 258.5)
-
Step 700
700
#075AC4
oklch(49.1% 0.18 258.5)
-
Step 800
800
#0D4A9F
oklch(42.7% 0.15 258.7)
-
Step 900
900
#143F7E
oklch(37.7% 0.117 258.5)
-
Step 950
950
#0D264A
oklch(27.1% 0.074 257.9)
#428BF8 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) | #5495FC | 0.033 |
| Deuteranopia (no green cones) | #2F85F6 | 0.022 |
| Tritanopia (no blue cones) | #00A5B5 | 0.140 |
| Achromatopsia (no color) | #8C8C8C | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428BF8
#428BF8
oklch(64.6% 0.178 258.5)
- #BA8200
#BA8200
oklch(64.6% 0.135 78.3)
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 #428BF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.022
- Dark Sky Blue #448EE4 ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.033
- Soft Blue #6488EA ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.048
- Clear Blue #247AFD ΔE 0.052
- Cornflower #6A79F7 ΔE 0.055
- Water Blue #0E87CC ΔE 0.074
Use #428BF8 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.