#306F64
Closest named color: Dark Aquamarine (#017371). oklch(49.7% 0.067 180.3), rgb(48, 111, 100).
Aa
White text reads best on this color (5.86:1).
About this color
#306F64 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.067 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.025 away. White text reads best on it, at 5.86:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #306F64 |
| RGB | rgb(48, 111, 100) |
| HSL | hsl(170, 40%, 31%) |
| OKLCH | oklch(49.7% 0.067 180.3) |
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 #306F64 | 5.86:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #306F64 | 3.58:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #306F64 text on white | 5.86:1 | AA | Lc 79.1 | Fine for body text |
| #306F64 text on black | 3.58:1 | AA large text | Lc -22.7 | 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
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CDDDD9
oklch(88.4% 0.018 179.3)
-
Step 300
300
#ABC8C1
oklch(80.9% 0.033 179.2)
-
Step 400
400
#7DACA2
oklch(70.8% 0.052 180.1)
-
Step 500
500
#5A978B
oklch(63.1% 0.066 180.1)
-
Step 600
600
#3D8175
oklch(55.5% 0.072 180.5)
-
Step 700
700 (this color)
#306F64
oklch(49.7% 0.067 180.3)
-
Step 800
800
#285950
oklch(42.7% 0.055 179.9)
-
Step 900
900
#254943
oklch(37.6% 0.043 181.9)
-
Step 950
950
#172B27
oklch(27.1% 0.027 180)
#306F64 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) | #6B6964 | 0.072 |
| Deuteranopia (no green cones) | #616265 | 0.068 |
| Tritanopia (no blue cones) | #07716C | 0.021 |
| Achromatopsia (no color) | #656565 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306F64
#306F64
oklch(49.7% 0.067 180.3)
- #825260
#825260
oklch(49.7% 0.067 0.9)
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 #306F64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.025
- Deep Turquoise #017374 ΔE 0.028
- Dark Aqua #05696B ΔE 0.034
- Bluegreen #017A79 ΔE 0.040
- Deep Aqua #08787F ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.043
- Teal #008080 ΔE 0.056
- Slate #516572 ΔE 0.056
Use #306F64 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.