#4166D1
Closest named color: Royal Blue (#4169E1). oklch(54.2% 0.17 266.4), rgb(65, 102, 209).
Aa
White text reads best on this color (5.19:1).
About this color
#4166D1 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.170 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.025 away. White text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #4166D1 |
| RGB | rgb(65, 102, 209) |
| HSL | hsl(225, 61%, 54%) |
| OKLCH | oklch(54.2% 0.17 266.4) |
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 #4166D1 | 5.19:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #4166D1 | 4.04:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #4166D1 text on white | 5.19:1 | AA | Lc 75.3 | Fine for body text |
| #4166D1 text on black | 4.04:1 | AA large text | Lc -26.4 | Dividers and decoration only |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F3
oklch(80.9% 0.076 266.5)
-
Step 400
400
#7D9EED
oklch(70.7% 0.122 266.1)
-
Step 500
500
#5D83E8
oklch(63.1% 0.158 266.4)
-
Step 600
600 (this color)
#4166D1
oklch(54.2% 0.17 266.4)
-
Step 700
700
#3758B9
oklch(49.1% 0.158 266.4)
-
Step 800
800
#2D4896
oklch(42.6% 0.132 266.4)
-
Step 900
900
#283D77
oklch(37.6% 0.102 266.5)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#4166D1 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) | #2474D5 | 0.038 |
| Deuteranopia (no green cones) | #0067CF | 0.037 |
| Tritanopia (no blue cones) | #007F92 | 0.137 |
| Achromatopsia (no color) | #6D6D6D | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4166D1
#4166D1
oklch(54.2% 0.17 266.4)
- #8B6A00
#8B6A00
oklch(54.2% 0.111 87)
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 #4166D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.025
- Warm Blue #4B57DB ΔE 0.040
- Neon Blue #4361EE ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.047
- Iris #6258C4 ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.053
- Mid Blue #276AB3 ΔE 0.055
- Azul #1D5DEC ΔE 0.056
Use #4166D1 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.