#4282E1
Closest named color: Dark Sky Blue (#448EE4). oklch(61.2% 0.159 258.3), rgb(66, 130, 225).
Aa
Black text reads best on this color (5.51:1).
About this color
#4282E1 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.159 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.032 away. Black text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.51:1 |
| White text | 3.80:1 |
Values
| HEX | #4282E1 |
| RGB | rgb(66, 130, 225) |
| HSL | hsl(216, 73%, 57%) |
| OKLCH | oklch(61.2% 0.159 258.3) |
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 #4282E1 | 3.80:1 | AA large text | Lc -70.8 | Content text, not long reading |
| Black text on #4282E1 | 5.51:1 | AA | Lc 38.8 | Non-text elements, placeholder text |
| #4282E1 text on white | 3.80:1 | AA large text | Lc 65.3 | Content text, not long reading |
| #4282E1 text on black | 5.51:1 | AA | Lc -36.4 | 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
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF6
oklch(88.6% 0.043 257.1)
-
Step 300
300
#A2C3F3
oklch(81% 0.077 257.7)
-
Step 400
400
#6FA2ED
oklch(70.8% 0.123 257.9)
-
Step 500
500 (this color)
#4282E1
oklch(61.2% 0.159 258.3)
-
Step 600
600
#286FD6
oklch(55.5% 0.173 258.4)
-
Step 700
700
#1B5DB9
oklch(49.2% 0.159 258.1)
-
Step 800
800
#194C96
oklch(42.7% 0.133 258.4)
-
Step 900
900
#1B4077
oklch(37.6% 0.103 258.4)
-
Step 950
950
#112646
oklch(27% 0.066 258.6)
#4282E1 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) | #548BE5 | 0.032 |
| Deuteranopia (no green cones) | #397CDF | 0.019 |
| Tritanopia (no blue cones) | #0098A6 | 0.126 |
| Achromatopsia (no color) | #838383 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4282E1
#4282E1
oklch(61.2% 0.159 258.3)
- #AD7800
#AD7800
oklch(61.1% 0.127 77.8)
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 #4282E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.032
- Soft Blue #6488EA ΔE 0.042
- Water Blue #0E87CC ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.053
- Clear Blue #247AFD ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.053
- Windows Blue #3778BF ΔE 0.057
- Cornflower #6A79F7 ΔE 0.059
Use #4282E1 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.