#4C71D1
Closest named color: Royal Blue (#4169E1). oklch(57% 0.154 265.9), rgb(76, 113, 209).
Aa
Black text reads best on this color (4.59:1).
About this color
#4C71D1 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.154 and its hue 266°. 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 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.59:1 |
| White text | 4.57:1 |
Values
| HEX | #4C71D1 |
| RGB | rgb(76, 113, 209) |
| HSL | hsl(223, 59%, 56%) |
| OKLCH | oklch(57% 0.154 265.9) |
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 #4C71D1 | 4.57:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #4C71D1 | 4.59:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #4C71D1 text on white | 4.57:1 | AA | Lc 71.5 | Content text, not long reading |
| #4C71D1 text on black | 4.59:1 | AA | Lc -30.2 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ACC0EE
oklch(80.9% 0.069 266.5)
-
Step 400
400
#809FE6
oklch(70.8% 0.11 265.7)
-
Step 500
500
#6185DF
oklch(63.2% 0.142 266)
-
Step 600
600 (this color)
#4C71D1
oklch(57% 0.154 265.9)
-
Step 700
700
#3A5AB1
oklch(49.1% 0.143 266.1)
-
Step 800
800
#304A8F
oklch(42.7% 0.118 266)
-
Step 900
900
#2A3F72
oklch(37.8% 0.091 265.4)
-
Step 950
950
#192543
oklch(27% 0.058 266.1)
#4C71D1 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) | #427CD5 | 0.029 |
| Deuteranopia (no green cones) | #2A70CF | 0.030 |
| Tritanopia (no blue cones) | #008797 | 0.129 |
| Achromatopsia (no color) | #757575 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C71D1
#4C71D1
oklch(57% 0.154 265.9)
- #967100
#967100
oklch(57% 0.117 85.7)
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 #4C71D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Windows Blue #3778BF ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.052
- French Blue #436BAD ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.062
- Mid Blue #276AB3 ΔE 0.062
- Neon Blue #4361EE ΔE 0.063
- Slate Blue #6A5ACD ΔE 0.064
Use #4C71D1 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.