#647171
Closest named color: Dim Gray (#696969). oklch(53.8% 0.016 196.7), rgb(100, 113, 113).
Aa
White text reads best on this color (5.06:1).
About this color
#647171 is a medium-dark close to neutral grey. In OKLCH its lightness is 54%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.023 away. White text reads best on it, at 5.06:1.
| Hue family | Neutrals |
| Lightness | medium-dark (54%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 4.14:1 |
| White text | 5.06:1 |
Values
| HEX | #647171 |
| RGB | rgb(100, 113, 113) |
| HSL | hsl(180, 6%, 42%) |
| OKLCH | oklch(53.8% 0.016 196.7) |
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 #647171 | 5.06:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #647171 | 4.14:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #647171 text on white | 5.06:1 | AA | Lc 75.0 | Fine for body text |
| #647171 text on black | 4.14:1 | AA large text | Lc -26.7 | 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
#F5F6F6
oklch(97.2% 0.001 197.1)
-
Step 100
100
#E8EAEA
oklch(93.6% 0.002 197.1)
-
Step 200
200
#D6DADA
oklch(88.5% 0.004 197.1)
-
Step 300
300
#BCC2C2
oklch(80.9% 0.007 197)
-
Step 400
400
#99A3A3
oklch(70.7% 0.011 196.9)
-
Step 500
500
#808C8C
oklch(63% 0.014 196.8)
-
Step 600
600 (this color)
#647171
oklch(53.8% 0.016 196.7)
-
Step 700
700
#586363
oklch(49% 0.014 196.7)
-
Step 800
800
#485151
oklch(42.7% 0.012 196.7)
-
Step 900
900
#3C4343
oklch(37.6% 0.009 196.8)
-
Step 950
950
#232727
oklch(26.9% 0.006 196.8)
#647171 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) | #6F7071 | 0.016 |
| Deuteranopia (no green cones) | #6C6E71 | 0.014 |
| Tritanopia (no blue cones) | #607271 | 0.006 |
| Achromatopsia (no color) | #6E6E6E | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647171
#647171
oklch(53.8% 0.016 196.7)
- #776B6B
#776B6B
oklch(53.9% 0.015 17.6)
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 #647171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.023
- Battleship Gray #6C757D ΔE 0.024
- Battleship Grey #6B7C85 ΔE 0.040
- Slate #516572 ΔE 0.048
- Grey Blue #647D8E ΔE 0.048
- Metallic Blue #4F738E ΔE 0.049
- Grey Brown #7F7053 ΔE 0.056
- Medium Grey #7D7F7C ΔE 0.058
Use #647171 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.