#646E80
Closest named color: Battleship Gray (#6C757D). oklch(53.6% 0.031 262.2), rgb(100, 110, 128).
Aa
White text reads best on this color (5.14:1).
About this color
#646E80 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.031 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.026 away. White text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.08:1 |
| White text | 5.14:1 |
Values
| HEX | #646E80 |
| RGB | rgb(100, 110, 128) |
| HSL | hsl(219, 12%, 45%) |
| OKLCH | oklch(53.6% 0.031 262.2) |
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 #646E80 | 5.14:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #646E80 | 4.08:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #646E80 text on white | 5.14:1 | AA | Lc 75.5 | Fine for body text |
| #646E80 text on black | 4.08:1 | AA large text | Lc -26.3 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6D9DE
oklch(88.4% 0.008 260.7)
-
Step 300
300
#BCC1CA
oklch(81% 0.014 262.4)
-
Step 400
400
#99A1AF
oklch(70.7% 0.022 261.7)
-
Step 500
500
#808A9B
oklch(63.1% 0.028 261.1)
-
Step 600
600 (this color)
#646E80
oklch(53.6% 0.031 262.2)
-
Step 700
700
#586171
oklch(49.1% 0.028 262)
-
Step 800
800
#484F5C
oklch(42.6% 0.023 262.9)
-
Step 900
900
#3C424C
oklch(37.7% 0.019 260.7)
-
Step 950
950
#23272C
oklch(27.1% 0.011 254)
#646E80 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) | #686F81 | 0.007 |
| Deuteranopia (no green cones) | #666C80 | 0.006 |
| Tritanopia (no blue cones) | #5D7274 | 0.028 |
| Achromatopsia (no color) | #6D6D6D | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646E80
#646E80
oklch(53.6% 0.031 262.2)
- #776C5A
#776C5A
oklch(53.6% 0.03 80.1)
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 #646E80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.026
- Metallic Blue #4F738E ΔE 0.032
- Dim Gray #696969 ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.042
- Grey Blue #647D8E ΔE 0.043
- Slate #516572 ΔE 0.043
- Dull Blue #49759C ΔE 0.051
- Stormy Blue #507B9C ΔE 0.051
Use #646E80 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.