#427EF9
Closest named color: Clear Blue (#247AFD). oklch(61.9% 0.195 262.6), rgb(66, 126, 249).
Aa
Black text reads best on this color (5.58:1).
About this color
#427EF9 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.195 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 5.58:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.195) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.58:1 |
| White text | 3.76:1 |
Values
| HEX | #427EF9 |
| RGB | rgb(66, 126, 249) |
| HSL | hsl(220, 94%, 62%) |
| OKLCH | oklch(61.9% 0.195 262.6) |
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 #427EF9 | 3.76:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #427EF9 | 5.58:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #427EF9 text on white | 3.76:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #427EF9 text on black | 5.58:1 | AA | Lc -37.0 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFD
oklch(88.5% 0.053 262.7)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6C9EFF
oklch(70.7% 0.152 262.5)
-
Step 500
500 (this color)
#427EF9
oklch(61.9% 0.195 262.6)
-
Step 600
600
#2867EC
oklch(55.6% 0.211 262.6)
-
Step 700
700
#1B55CE
oklch(49.2% 0.197 262.5)
-
Step 800
800
#1946A6
oklch(42.7% 0.163 262.7)
-
Step 900
900
#1A3C84
oklch(37.7% 0.128 262.8)
-
Step 950
950
#10244D
oklch(27% 0.08 262.7)
#427EF9 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) | #348CFD | 0.035 |
| Deuteranopia (no green cones) | #007CF7 | 0.031 |
| Tritanopia (no blue cones) | #009BB0 | 0.152 |
| Achromatopsia (no color) | #848484 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #427EF9
#427EF9
oklch(61.9% 0.195 262.6)
- #AB7D00
#AB7D00
oklch(61.9% 0.127 82.6)
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 #427EF9, closest first.
No curated palette has a color within ΔE 0.04 of #427EF9.
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 0.052
- Dark Sky Blue #448EE4 ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.058
- Royal Blue #4169E1 ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.065
Use #427EF9 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.