#64737C
Closest named color: Battleship Gray (#6C757D). oklch(54.6% 0.023 234.2), rgb(100, 115, 124).
Aa
White text reads best on this color (4.90:1).
About this color
#64737C is a medium-dark close to neutral grey. In OKLCH its lightness is 55%, its chroma 0.023. 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 4.90:1.
| Hue family | Neutrals |
| Lightness | medium-dark (55%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.28:1 |
| White text | 4.90:1 |
Values
| HEX | #64737C |
| RGB | rgb(100, 115, 124) |
| HSL | hsl(203, 11%, 44%) |
| OKLCH | oklch(54.6% 0.023 234.2) |
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 #64737C | 4.90:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #64737C | 4.28:1 | AA large text | Lc 30.1 | Non-text elements, placeholder text |
| #64737C text on white | 4.90:1 | AA | Lc 74.0 | Content text, not long reading |
| #64737C text on black | 4.28:1 | AA large text | Lc -27.7 | 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
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D6DADC
oklch(88.6% 0.005 228.8)
-
Step 300
300
#BAC2C6
oklch(80.9% 0.011 228.9)
-
Step 400
400
#97A3A9
oklch(70.8% 0.016 229.1)
-
Step 500
500
#7E8C94
oklch(63.1% 0.02 232.7)
-
Step 600
600 (this color)
#64737C
oklch(54.6% 0.023 234.2)
-
Step 700
700
#55636B
oklch(49.1% 0.021 232.9)
-
Step 800
800
#465157
oklch(42.8% 0.017 231.6)
-
Step 900
900
#3B4348
oklch(37.7% 0.014 235.2)
-
Step 950
950
#22272A
oklch(26.9% 0.009 234.1)
#64737C 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) | #6F727C | 0.016 |
| Deuteranopia (no green cones) | #6B707C | 0.013 |
| Tritanopia (no blue cones) | #5E7576 | 0.015 |
| Achromatopsia (no color) | #717171 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64737C
#64737C
oklch(54.6% 0.023 234.2)
- #7C6D64
#7C6D64
oklch(54.6% 0.023 53)
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 #64737C, 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 0.029
- Grey Blue #647D8E ΔE 0.034
- Dim Gray #696969 ΔE 0.034
- Metallic Blue #4F738E ΔE 0.037
- Slate Gray #708090 ΔE 0.047
- Steel Grey #6F828A ΔE 0.048
- Stormy Blue #507B9C ΔE 0.051
Use #64737C 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.