#4B5166
Closest named color: Dusty Grape (#545775). oklch(43.8% 0.036 272.4), rgb(75, 81, 102).
Aa
White text reads best on this color (7.87:1).
About this color
#4B5166 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.036 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.032 away. White text reads best on it, at 7.87:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #4B5166 |
| RGB | rgb(75, 81, 102) |
| HSL | hsl(227, 15%, 35%) |
| OKLCH | oklch(43.8% 0.036 272.4) |
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 #4B5166 | 7.87:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #4B5166 | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #4B5166 text on white | 7.87:1 | AAA | Lc 87.3 | Fine for body text |
| #4B5166 text on black | 2.66:1 | Fails | Lc -14.8 | Not readable |
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 800.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BCC0CE
oklch(80.9% 0.02 273.2)
-
Step 400
400
#99A0B6
oklch(70.7% 0.033 271.5)
-
Step 500
500
#8088A4
oklch(63% 0.043 272.6)
-
Step 600
600
#6A728F
oklch(55.6% 0.046 272.8)
-
Step 700
700
#585F7A
oklch(49% 0.044 273.4)
-
Step 800
800 (this color)
#4B5166
oklch(43.8% 0.036 272.4)
-
Step 900
900
#3C4151
oklch(37.7% 0.028 271.4)
-
Step 950
950
#23262F
oklch(26.9% 0.017 270.7)
#4B5166 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) | #4B5367 | 0.006 |
| Deuteranopia (no green cones) | #495165 | 0.004 |
| Tritanopia (no blue cones) | #445558 | 0.032 |
| Achromatopsia (no color) | #525252 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5166
#4B5166
oklch(43.8% 0.036 272.4)
- #59523B
#59523B
oklch(43.9% 0.037 93.2)
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 #4B5166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.032
- YInMn Blue #415A77 ΔE 0.034
- Dusk #4E5481 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.057
- Slate #516572 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.062
- Twilight #4E518B ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.063
Use #4B5166 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.