#63757D
Closest named color: Battleship Gray (#6C757D). oklch(55.1% 0.025 226.5), rgb(99, 117, 125).
Aa
White text reads best on this color (4.80:1).
About this color
#63757D is a medium-dark close to neutral grey. In OKLCH its lightness is 55%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Battleship Gray (#6C757D), ΔE 0.013 away. White text reads best on it, at 4.80:1.
| Hue family | Neutrals |
| Lightness | medium-dark (55%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.37:1 |
| White text | 4.80:1 |
Values
| HEX | #63757D |
| RGB | rgb(99, 117, 125) |
| HSL | hsl(198, 12%, 44%) |
| OKLCH | oklch(55.1% 0.025 226.5) |
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 #63757D | 4.80:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #63757D | 4.37:1 | AA large text | Lc 30.7 | Non-text elements, placeholder text |
| #63757D text on white | 4.80:1 | AA | Lc 73.3 | Content text, not long reading |
| #63757D text on black | 4.37:1 | AA large text | Lc -28.4 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D5DADC
oklch(88.5% 0.006 223.5)
-
Step 300
300
#B9C2C6
oklch(80.8% 0.011 226)
-
Step 400
400
#96A3A9
oklch(70.7% 0.017 227.1)
-
Step 500
500
#7C8D94
oklch(63.2% 0.022 224.5)
-
Step 600
600 (this color)
#63757D
oklch(55.1% 0.025 226.5)
-
Step 700
700
#53646B
oklch(49.2% 0.024 224.7)
-
Step 800
800
#445157
oklch(42.6% 0.019 227.4)
-
Step 900
900
#3A4348
oklch(37.7% 0.015 232.1)
-
Step 950
950
#22272A
oklch(26.9% 0.009 234.1)
#63757D 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) | #71747D | 0.020 |
| Deuteranopia (no green cones) | #6D717D | 0.017 |
| Tritanopia (no blue cones) | #5C7777 | 0.016 |
| Achromatopsia (no color) | #727272 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63757D
#63757D
oklch(55.1% 0.025 226.5)
- #7F6E66
#7F6E66
oklch(55.2% 0.025 46.8)
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 #63757D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.013
- Battleship Grey #6B7C85 ΔE 0.025
- Grey Blue #647D8E ΔE 0.030
- Metallic Blue #4F738E ΔE 0.037
- Dim Gray #696969 ΔE 0.039
- Steel Grey #6F828A ΔE 0.044
- Slate Gray #708090 ΔE 0.044
- Stormy Blue #507B9C ΔE 0.049
Use #63757D 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.