#4171DD
Closest named color: Royal Blue (#4169E1). oklch(57.3% 0.173 263.8), rgb(65, 113, 221).
Aa
Black text reads best on this color (4.63:1).
About this color
#4171DD is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.173 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.022 away. Black text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.63:1 |
| White text | 4.53:1 |
Values
| HEX | #4171DD |
| RGB | rgb(65, 113, 221) |
| HSL | hsl(222, 70%, 56%) |
| OKLCH | oklch(57.3% 0.173 263.8) |
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 #4171DD | 4.53:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #4171DD | 4.63:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #4171DD text on white | 4.53:1 | AA | Lc 71.1 | Content text, not long reading |
| #4171DD text on black | 4.63:1 | AA | Lc -30.6 | 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
#CBDAF7
oklch(88.6% 0.043 263.7)
-
Step 300
300
#A7C1F4
oklch(80.9% 0.078 263.6)
-
Step 400
400
#789FEE
oklch(70.7% 0.124 263.5)
-
Step 500
500
#5685E9
oklch(63.2% 0.159 263.6)
-
Step 600
600 (this color)
#4171DD
oklch(57.3% 0.173 263.8)
-
Step 700
700
#2F59BB
oklch(49.1% 0.162 263.9)
-
Step 800
800
#274997
oklch(42.6% 0.134 263.9)
-
Step 900
900
#243E78
oklch(37.6% 0.104 263.9)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#4171DD 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) | #347EE1 | 0.033 |
| Deuteranopia (no green cones) | #006FDB | 0.035 |
| Tritanopia (no blue cones) | #008B9C | 0.141 |
| Achromatopsia (no color) | #767676 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4171DD
#4171DD
oklch(57.3% 0.173 263.8)
- #997100
#997100
oklch(57.3% 0.118 83.9)
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 #4171DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.022
- Cerulean Blue #056EEE ΔE 0.042
- Neon Blue #4361EE ΔE 0.048
- Clear Blue #247AFD ΔE 0.052
- Windows Blue #3778BF ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.062
- Azul #1D5DEC ΔE 0.065
Use #4171DD 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.