#647A7E
Closest named color: Battleship Grey (#6B7C85). oklch(56.3% 0.026 209.8), rgb(100, 122, 126).
Aa
Black text reads best on this color (4.62:1).
About this color
#647A7E is a medium-dark close to neutral grey. In OKLCH its lightness is 56%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.016 away. Black text reads best on it, at 4.62:1.
| Hue family | Neutrals |
| Lightness | medium-dark (56%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #647A7E |
| RGB | rgb(100, 122, 126) |
| HSL | hsl(189, 12%, 44%) |
| OKLCH | oklch(56.3% 0.026 209.8) |
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 #647A7E | 4.53:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #647A7E | 4.62:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #647A7E text on white | 4.53:1 | AA | Lc 71.5 | Content text, not long reading |
| #647A7E text on black | 4.62:1 | AA | Lc -30.2 | Non-text elements, placeholder text |
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
#E7EAEB
oklch(93.5% 0.004 219.5)
-
Step 200
200
#D4DADB
oklch(88.4% 0.007 208.8)
-
Step 300
300
#B8C3C5
oklch(80.9% 0.012 209.8)
-
Step 400
400
#94A4A7
oklch(70.7% 0.019 210.2)
-
Step 500
500
#798E92
oklch(63.1% 0.025 210.4)
-
Step 600
600 (this color)
#647A7E
oklch(56.3% 0.026 209.8)
-
Step 700
700
#516568
oklch(49.1% 0.025 207.6)
-
Step 800
800
#425255
oklch(42.6% 0.021 210.3)
-
Step 900
900
#384446
oklch(37.7% 0.016 208.8)
-
Step 950
950
#212829
oklch(27% 0.01 207.1)
#647A7E 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) | #76787E | 0.025 |
| Deuteranopia (no green cones) | #72757E | 0.023 |
| Tritanopia (no blue cones) | #5C7C7B | 0.013 |
| Achromatopsia (no color) | #767676 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647A7E
#647A7E
oklch(56.3% 0.026 209.8)
- #84706C
#84706C
oklch(56.3% 0.026 31.2)
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 #647A7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.016
- Battleship Gray #6C757D ΔE 0.017
- Grey Blue #647D8E ΔE 0.024
- Steel Grey #6F828A ΔE 0.032
- Slate Gray #708090 ΔE 0.035
- Medium Grey #7D7F7C ΔE 0.040
- Gray #808080 ΔE 0.045
- Metallic Blue #4F738E ΔE 0.046
Use #647A7E 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.