#4277E7
Closest named color: Royal Blue (#4169E1). oklch(59.3% 0.179 263), rgb(66, 119, 231).
Aa
Black text reads best on this color (5.02:1).
About this color
#4277E7 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.179 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #4277E7 |
| RGB | rgb(66, 119, 231) |
| HSL | hsl(221, 77%, 58%) |
| OKLCH | oklch(59.3% 0.179 263) |
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 #4277E7 | 4.17:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #4277E7 | 5.02:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #4277E7 text on white | 4.17:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #4277E7 text on black | 5.02:1 | AA | Lc -33.3 | 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 600.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF8
oklch(88.6% 0.045 263.1)
-
Step 300
300
#A5C1F6
oklch(80.9% 0.081 263)
-
Step 400
400
#759FF1
oklch(70.7% 0.129 262.9)
-
Step 500
500
#5285EC
oklch(63.2% 0.164 262.8)
-
Step 600
600 (this color)
#4277E7
oklch(59.3% 0.179 263)
-
Step 700
700
#2A59BD
oklch(49.1% 0.166 262.9)
-
Step 800
800
#244999
oklch(42.6% 0.138 263.1)
-
Step 900
900
#223E7A
oklch(37.7% 0.108 263.3)
-
Step 950
950
#142547
oklch(27% 0.067 262.7)
#4277E7 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) | #3784EB | 0.033 |
| Deuteranopia (no green cones) | #0075E5 | 0.034 |
| Tritanopia (no blue cones) | #0092A4 | 0.144 |
| Achromatopsia (no color) | #7C7C7C | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4277E7
#4277E7
oklch(59.3% 0.179 263)
- #A17600
#A17600
oklch(59.3% 0.122 83)
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 #4277E7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Clear Blue #247AFD ΔE 0.037
- Cerulean Blue #056EEE ΔE 0.044
- Cornflower #6A79F7 ΔE 0.052
- Neon Blue #4361EE ΔE 0.055
- Soft Blue #6488EA ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.062
- Windows Blue #3778BF ΔE 0.064
Use #4277E7 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.