#4271D6
Closest named color: Royal Blue (#4169E1). oklch(56.9% 0.164 263.4), rgb(66, 113, 214).
Aa
White text reads best on this color (4.60:1).
About this color
#4271D6 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.164 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.028 away. White text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #4271D6 |
| RGB | rgb(66, 113, 214) |
| HSL | hsl(221, 64%, 55%) |
| OKLCH | oklch(56.9% 0.164 263.4) |
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 #4271D6 | 4.60:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #4271D6 | 4.56:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #4271D6 text on white | 4.60:1 | AA | Lc 71.6 | Content text, not long reading |
| #4271D6 text on black | 4.56:1 | AA | Lc -30.1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F1
oklch(80.9% 0.074 263.3)
-
Step 400
400
#7A9FEA
oklch(70.6% 0.118 263.6)
-
Step 500
500
#5886E4
oklch(63.2% 0.15 263.1)
-
Step 600
600 (this color)
#4271D6
oklch(56.9% 0.164 263.4)
-
Step 700
700
#315BB6
oklch(49.2% 0.152 263.3)
-
Step 800
800
#294A93
oklch(42.6% 0.126 263.6)
-
Step 900
900
#253F75
oklch(37.7% 0.098 263.2)
-
Step 950
950
#162545
oklch(27% 0.063 263.8)
#4271D6 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) | #3B7CDA | 0.028 |
| Deuteranopia (no green cones) | #176FD4 | 0.031 |
| Tritanopia (no blue cones) | #008999 | 0.133 |
| Achromatopsia (no color) | #757575 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4271D6
#4271D6
oklch(56.9% 0.164 263.4)
- #986F00
#986F00
oklch(56.8% 0.117 82.9)
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 #4271D6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.028
- Windows Blue #3778BF ΔE 0.044
- Cerulean Blue #056EEE ΔE 0.049
- Neon Blue #4361EE ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.057
- Clear Blue #247AFD ΔE 0.062
- Mid Blue #276AB3 ΔE 0.063
- French Blue #436BAD ΔE 0.064
Use #4271D6 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.