#337663
Closest named color: Dark Aquamarine (#017371). oklch(51.7% 0.075 172.1), rgb(51, 118, 99).
Aa
White text reads best on this color (5.36:1).
About this color
#337663 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.075 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.034 away. White text reads best on it, at 5.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.91:1 |
| White text | 5.36:1 |
Values
| HEX | #337663 |
| RGB | rgb(51, 118, 99) |
| HSL | hsl(163, 40%, 33%) |
| OKLCH | oklch(51.7% 0.075 172.1) |
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 #337663 | 5.36:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #337663 | 3.91:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #337663 text on white | 5.36:1 | AA | Lc 76.5 | Fine for body text |
| #337663 text on black | 3.91:1 | AA large text | Lc -25.2 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CDDED7
oklch(88.6% 0.021 169.3)
-
Step 300
300
#AAC9BE
oklch(81% 0.037 171.9)
-
Step 400
400
#7BAD9C
oklch(70.7% 0.059 171.5)
-
Step 500
500
#579884
oklch(63% 0.074 172)
-
Step 600
600
#39836E
oklch(55.7% 0.081 172)
-
Step 700
700 (this color)
#337663
oklch(51.7% 0.075 172.1)
-
Step 800
800
#255A4B
oklch(42.7% 0.062 172.1)
-
Step 900
900
#244A3F
oklch(37.7% 0.048 172.7)
-
Step 950
950
#162B25
oklch(26.9% 0.03 173.8)
#337663 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) | #736F62 | 0.078 |
| Deuteranopia (no green cones) | #686764 | 0.074 |
| Tritanopia (no blue cones) | #107770 | 0.024 |
| Achromatopsia (no color) | #6B6B6B | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337663
#337663
oklch(51.7% 0.075 172.1)
- #89566C
#89566C
oklch(51.7% 0.074 352.5)
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 #337663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.034
- Bluegreen #017A79 ΔE 0.035
- Deep Turquoise #017374 ΔE 0.037
- Deep Aqua #08787F ΔE 0.044
- Teal #008080 ΔE 0.046
- Dark Aqua #05696B ΔE 0.055
- Dark Green Blue #1F6357 ΔE 0.064
- Dark Moss Green #606C38 ΔE 0.067
Use #337663 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.