#00636E
Closest named color: Petrol (#005F6A). oklch(45.7% 0.079 208), rgb(0, 99, 110).
Aa
White text reads best on this color (6.97:1).
About this color
#00636E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.079 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.013 away. White text reads best on it, at 6.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.00:1 |
| White text | 6.97:1 |
Values
| HEX | #00636E |
| RGB | rgb(0, 99, 110) |
| HSL | hsl(186, 100%, 22%) |
| OKLCH | oklch(45.7% 0.079 208) |
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 #00636E | 6.97:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #00636E | 3.00:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #00636E text on white | 6.97:1 | AA | Lc 83.6 | Fine for body text |
| #00636E text on black | 3.00:1 | AA large text | Lc -18.3 | 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 800.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C7DEE2
oklch(88.5% 0.025 209.3)
-
Step 300
300
#9FC9D0
oklch(80.8% 0.045 208.8)
-
Step 400
400
#66AEB9
oklch(70.8% 0.074 208.2)
-
Step 500
500
#3299A7
oklch(63.1% 0.094 208.1)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800 (this color)
#00636E
oklch(45.7% 0.079 208)
-
Step 900
900
#094A52
oklch(37.6% 0.061 207.9)
-
Step 950
950
#0A2C30
oklch(27.1% 0.039 206.2)
#00636E 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) | #595F6F | 0.076 |
| Deuteranopia (no green cones) | #4C556E | 0.069 |
| Tritanopia (no blue cones) | #006866 | 0.024 |
| Achromatopsia (no color) | #595959 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00636E
#00636E
oklch(45.7% 0.079 208)
- #7D453E
#7D453E
oklch(45.6% 0.078 28.1)
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 #00636E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.013
- Dark Aqua #05696B ΔE 0.022
- Dark Green Blue #1F6357 ΔE 0.038
- Deep Teal #00555A ΔE 0.049
- Deep Turquoise #017374 ΔE 0.050
- Dark Aquamarine #017371 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.063
Use #00636E 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.