#636D74
Closest named color: Dim Gray (#696969). oklch(52.9% 0.016 238.3), rgb(99, 109, 116).
Aa
White text reads best on this color (5.28:1).
About this color
#636D74 is a medium-dark close to neutral grey. In OKLCH its lightness is 53%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.018 away. White text reads best on it, at 5.28:1.
| Hue family | Neutrals |
| Lightness | medium-dark (53%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #636D74 |
| RGB | rgb(99, 109, 116) |
| HSL | hsl(205, 8%, 42%) |
| OKLCH | oklch(52.9% 0.016 238.3) |
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 #636D74 | 5.28:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #636D74 | 3.97:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #636D74 text on white | 5.28:1 | AA | Lc 76.3 | Fine for body text |
| #636D74 text on black | 3.97:1 | AA large text | Lc -25.4 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D7D9DB
oklch(88.4% 0.004 247.9)
-
Step 300
300
#BCC1C5
oklch(80.8% 0.008 241.7)
-
Step 400
400
#9AA2A7
oklch(70.7% 0.012 234.9)
-
Step 500
500
#818B92
oklch(63.1% 0.016 238.2)
-
Step 600
600 (this color)
#636D74
oklch(52.9% 0.016 238.3)
-
Step 700
700
#596269
oklch(49.1% 0.016 241.2)
-
Step 800
800
#495055
oklch(42.7% 0.012 238.8)
-
Step 900
900
#3D4246
oklch(37.6% 0.01 241.9)
-
Step 950
950
#242729
oklch(27% 0.006 236.7)
#636D74 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) | #6A6D74 | 0.010 |
| Deuteranopia (no green cones) | #686B74 | 0.009 |
| Tritanopia (no blue cones) | #5F6F6F | 0.013 |
| Achromatopsia (no color) | #6C6C6C | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #636D74
#636D74
oklch(52.9% 0.016 238.3)
- #736962
#736962
oklch(52.8% 0.017 57.4)
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 #636D74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.018
- Battleship Gray #6C757D ΔE 0.029
- Slate #516572 ΔE 0.037
- Metallic Blue #4F738E ΔE 0.044
- Battleship Grey #6B7C85 ΔE 0.048
- Grey Blue #647D8E ΔE 0.053
- Purple Grey #866F85 ΔE 0.063
- Grey Purple #826D8C ΔE 0.064
Use #636D74 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.