#646477
Closest named color: Slate (#516572). oklch(51% 0.03 285.3), rgb(100, 100, 119).
Aa
White text reads best on this color (5.78:1).
About this color
#646477 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 5.78:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.63:1 |
| White text | 5.78:1 |
Values
| HEX | #646477 |
| RGB | rgb(100, 100, 119) |
| HSL | hsl(240, 9%, 43%) |
| OKLCH | oklch(51% 0.03 285.3) |
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 #646477 | 5.78:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #646477 | 3.63:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #646477 text on white | 5.78:1 | AA | Lc 79.0 | Fine for body text |
| #646477 text on black | 3.63:1 | AA large text | Lc -22.8 | 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 700.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EC
oklch(93.5% 0.004 286.3)
-
Step 200
200
#D8D8DE
oklch(88.4% 0.008 286.2)
-
Step 300
300
#BFBFCA
oklch(80.8% 0.015 286.1)
-
Step 400
400
#9F9FAF
oklch(70.8% 0.023 285.8)
-
Step 500
500
#87879B
oklch(63% 0.03 285.5)
-
Step 600
600
#717186
oklch(55.6% 0.032 285.3)
-
Step 700
700 (this color)
#646477
oklch(51% 0.03 285.3)
-
Step 800
800
#4D4D5C
oklch(42.6% 0.025 285.3)
-
Step 900
900
#40404C
oklch(37.6% 0.02 285.4)
-
Step 950
950
#26262C
oklch(27.1% 0.011 285.6)
#646477 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) | #606678 | 0.008 |
| Deuteranopia (no green cones) | #5F6576 | 0.008 |
| Tritanopia (no blue cones) | #60676A | 0.026 |
| Achromatopsia (no color) | #666666 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646477
#646477
oklch(51% 0.03 285.3)
- #686754
#686754
oklch(50.9% 0.029 104.9)
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 #646477, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- Dim Gray #696969 ΔE 0.032
- Dusty Grape #545775 ΔE 0.048
- Battleship Gray #6C757D ΔE 0.052
- Metallic Blue #4F738E ΔE 0.052
- Dusty Purple #825F87 ΔE 0.059
- Muted Purple #805B87 ΔE 0.061
- YInMn Blue #415A77 ΔE 0.061
Use #646477 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.