#647B83
Closest named color: Battleship Grey (#6B7C85). oklch(56.7% 0.03 221), rgb(100, 123, 131).
Aa
Black text reads best on this color (4.70:1).
About this color
#647B83 is a medium-dark close to neutral grey. In OKLCH its lightness is 57%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.011 away. Black text reads best on it, at 4.70:1.
| Hue family | Neutrals |
| Lightness | medium-dark (57%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #647B83 |
| RGB | rgb(100, 123, 131) |
| HSL | hsl(195, 13%, 45%) |
| OKLCH | oklch(56.7% 0.03 221) |
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 #647B83 | 4.46:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #647B83 | 4.70:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #647B83 text on white | 4.46:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #647B83 text on black | 4.70:1 | AA | Lc -30.7 | 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
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D4DADC
oklch(88.4% 0.007 219.6)
-
Step 300
300
#B8C3C7
oklch(81% 0.013 221.5)
-
Step 400
400
#93A4AA
oklch(70.7% 0.021 221)
-
Step 500
500
#788E95
oklch(63.2% 0.027 219)
-
Step 600
600 (this color)
#647B83
oklch(56.7% 0.03 221)
-
Step 700
700
#50656C
oklch(49.2% 0.028 220.1)
-
Step 800
800
#425258
oklch(42.7% 0.022 222.6)
-
Step 900
900
#384448
oklch(37.7% 0.017 220)
-
Step 950
950
#21282A
oklch(27.1% 0.011 216.9)
#647B83 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) | #767983 | 0.025 |
| Deuteranopia (no green cones) | #717683 | 0.022 |
| Tritanopia (no blue cones) | #5B7E7D | 0.019 |
| Achromatopsia (no color) | #777777 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647B83
#647B83
oklch(56.7% 0.03 221)
- #877169
#877169
oklch(56.7% 0.03 41)
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 #647B83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.011
- Grey Blue #647D8E ΔE 0.016
- Battleship Gray #6C757D ΔE 0.019
- Steel Grey #6F828A ΔE 0.027
- Slate Gray #708090 ΔE 0.029
- Medium Grey #7D7F7C ΔE 0.040
- Steel #738595 ΔE 0.043
- Metallic Blue #4F738E ΔE 0.043
Use #647B83 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.