#427EEC
Closest named color: Clear Blue (#247AFD). oklch(61.1% 0.178 261.3), rgb(66, 126, 236).
Aa
Black text reads best on this color (5.42:1).
About this color
#427EEC is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.178 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.035 away. Black text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.42:1 |
| White text | 3.86:1 |
Values
| HEX | #427EEC |
| RGB | rgb(66, 126, 236) |
| HSL | hsl(219, 82%, 59%) |
| OKLCH | oklch(61.1% 0.178 261.3) |
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 #427EEC | 3.86:1 | AA large text | Lc -71.3 | Content text, not long reading |
| Black text on #427EEC | 5.42:1 | AA | Lc 38.3 | Non-text elements, placeholder text |
| #427EEC text on white | 3.86:1 | AA large text | Lc 65.8 | Content text, not long reading |
| #427EEC text on black | 5.42:1 | AA | Lc -35.9 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A1C2F9
oklch(81% 0.086 260.5)
-
Step 400
400
#6E9FF7
oklch(70.6% 0.14 261.4)
-
Step 500
500 (this color)
#427EEC
oklch(61.1% 0.178 261.3)
-
Step 600
600
#2A6BE2
oklch(55.6% 0.193 261.2)
-
Step 700
700
#1D58C4
oklch(49% 0.18 261.3)
-
Step 800
800
#1A499F
oklch(42.7% 0.149 261.2)
-
Step 900
900
#1B3E7E
oklch(37.7% 0.116 261.2)
-
Step 950
950
#11254A
oklch(27.1% 0.074 261.5)
#427EEC 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) | #438AF0 | 0.031 |
| Deuteranopia (no green cones) | #177AEA | 0.030 |
| Tritanopia (no blue cones) | #0098AA | 0.140 |
| Achromatopsia (no color) | #818181 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #427EEC
#427EEC
oklch(61.1% 0.178 261.3)
- #A97A00
#A97A00
oklch(61% 0.126 81.5)
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 #427EEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.046
- Soft Blue #6488EA ΔE 0.046
- Cornflower #6A79F7 ΔE 0.047
- Dodger Blue #1E90FF ΔE 0.050
- Royal Blue #4169E1 ΔE 0.054
- Cerulean Blue #056EEE ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.062
Use #427EEC 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.