#00646D
Closest named color: Petrol (#005F6A). oklch(45.9% 0.079 205.6), rgb(0, 100, 109).
Aa
White text reads best on this color (6.89:1).
About this color
#00646D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.079 and its hue 206°. 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 6.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.04:1 |
| White text | 6.89:1 |
Values
| HEX | #00646D |
| RGB | rgb(0, 100, 109) |
| HSL | hsl(185, 100%, 21%) |
| OKLCH | oklch(45.9% 0.079 205.6) |
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 #00646D | 6.89:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #00646D | 3.04:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #00646D text on white | 6.89:1 | AA | Lc 83.3 | Fine for body text |
| #00646D text on black | 3.04:1 | 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 700.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A5C8CC
oklch(80.9% 0.038 205)
-
Step 400
400
#72ACB3
oklch(70.7% 0.061 205.5)
-
Step 500
500
#4997A0
oklch(63.1% 0.078 205.4)
-
Step 600
600
#24818B
oklch(55.5% 0.084 205.6)
-
Step 700
700 (this color)
#00646D
oklch(45.9% 0.079 205.6)
-
Step 800
800
#165960
oklch(42.7% 0.065 205.3)
-
Step 900
900
#1B494F
oklch(37.7% 0.05 207)
-
Step 950
950
#112B2E
oklch(27% 0.032 205.4)
#00646D 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) | #5A5F6E | 0.077 |
| Deuteranopia (no green cones) | #4D566D | 0.070 |
| Tritanopia (no blue cones) | #006967 | 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°).
- #00646D
#00646D
oklch(45.9% 0.079 205.6)
- #7E4541
#7E4541
oklch(45.8% 0.079 24.9)
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 #00646D, 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 0.018
- Dark Green Blue #1F6357 ΔE 0.036
- Deep Turquoise #017374 ΔE 0.047
- Dark Aquamarine #017371 ΔE 0.047
- Deep Teal #00555A ΔE 0.051
- YInMn Blue #415A77 ΔE 0.058
- Deep Aqua #08787F ΔE 0.063
Use #00646D 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.