#00646C
Closest named color: Petrol (#005F6A). oklch(45.9% 0.078 204.4), rgb(0, 100, 108).
Aa
White text reads best on this color (6.90:1).
About this color
#00646C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.078 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.016 away. White text reads best on it, at 6.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.03:1 |
| White text | 6.90:1 |
Values
| HEX | #00646C |
| RGB | rgb(0, 100, 108) |
| HSL | hsl(184, 100%, 21%) |
| OKLCH | oklch(45.9% 0.078 204.4) |
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 #00646C | 6.90:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #00646C | 3.03:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #00646C text on white | 6.90:1 | AA | Lc 83.4 | Fine for body text |
| #00646C text on black | 3.03:1 | AA large text | Lc -18.6 | 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 800.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C7DEE1
oklch(88.4% 0.025 206.2)
-
Step 300
300
#9FCACE
oklch(81% 0.046 203.3)
-
Step 400
400
#66AEB6
oklch(70.7% 0.073 204.8)
-
Step 500
500
#319AA4
oklch(63.2% 0.094 204.3)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800 (this color)
#00646C
oklch(45.9% 0.078 204.4)
-
Step 900
900
#084B51
oklch(37.8% 0.061 204.5)
-
Step 950
950
#0A2C2F
oklch(27% 0.039 203.4)
#00646C 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) | #5A5F6D | 0.077 |
| Deuteranopia (no green cones) | #4E566C | 0.071 |
| Tritanopia (no blue cones) | #006966 | 0.022 |
| Achromatopsia (no color) | #5A5A5A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00646C
#00646C
oklch(45.9% 0.078 204.4)
- #7E4542
#7E4542
oklch(45.9% 0.079 23.8)
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 #00646C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.016
- Dark Aqua #05696B ΔE 0.017
- Dark Green Blue #1F6357 ΔE 0.034
- Deep Turquoise #017374 ΔE 0.047
- Dark Aquamarine #017371 ΔE 0.047
- Deep Teal #00555A ΔE 0.051
- YInMn Blue #415A77 ΔE 0.059
- Deep Aqua #08787F ΔE 0.064
Use #00646C 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.