#427EFF
Closest named color: Clear Blue (#247AFD). oklch(62.4% 0.202 263.1), rgb(66, 126, 255).
Aa
Black text reads best on this color (5.65:1).
About this color
#427EFF is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.202 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.024 away. Black text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.202) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.65:1 |
| White text | 3.71:1 |
Values
| HEX | #427EFF |
| RGB | rgb(66, 126, 255) |
| HSL | hsl(221, 100%, 63%) |
| OKLCH | oklch(62.4% 0.202 263.1) |
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 #427EFF | 3.71:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #427EFF | 5.65:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #427EFF text on white | 3.71:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #427EFF text on black | 5.65:1 | AA | Lc -37.5 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500 (this color)
#427EFF
oklch(62.4% 0.202 263.1)
-
Step 600
600
#2765F1
oklch(55.5% 0.22 263.1)
-
Step 700
700
#1B53D2
oklch(49.2% 0.204 263.1)
-
Step 800
800
#1845AA
oklch(42.8% 0.17 263.1)
-
Step 900
900
#193B86
oklch(37.6% 0.132 263.2)
-
Step 950
950
#0F244F
oklch(27.1% 0.084 262.6)
#427EFF 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) | #2A8EFF | 0.040 |
| Deuteranopia (no green cones) | #007CFC | 0.031 |
| Tritanopia (no blue cones) | #009DB3 | 0.159 |
| Achromatopsia (no color) | #858585 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #427EFF
#427EFF
oklch(62.4% 0.202 263.1)
- #AC7F00
#AC7F00
oklch(62.4% 0.128 83.5)
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 #427EFF, closest first.
No curated palette has a color within ΔE 0.04 of #427EFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.024
- Cornflower #6A79F7 ΔE 0.042
- Dodger Blue #1E90FF ΔE 0.046
- Soft Blue #6488EA ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.066
- Chefchaouen Blue #4895EF ΔE 0.068
Use #427EFF 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.