#306D63
Closest named color: Dark Aquamarine (#017371). oklch(49.1% 0.065 181.3), rgb(48, 109, 99).
Aa
White text reads best on this color (6.01:1).
About this color
#306D63 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 49%, its chroma 0.065 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.028 away. White text reads best on it, at 6.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.49:1 |
| White text | 6.01:1 |
Values
| HEX | #306D63 |
| RGB | rgb(48, 109, 99) |
| HSL | hsl(170, 39%, 31%) |
| OKLCH | oklch(49.1% 0.065 181.3) |
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 #306D63 | 6.01:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #306D63 | 3.49:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #306D63 text on white | 6.01:1 | AA | Lc 79.9 | Fine for body text |
| #306D63 text on black | 3.49:1 | AA large text | Lc -22.0 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#ABC8C2
oklch(81% 0.032 181.6)
-
Step 400
400
#7EABA2
oklch(70.6% 0.05 181.1)
-
Step 500
500
#5B978C
oklch(63.2% 0.065 181.1)
-
Step 600
600
#3F8176
oklch(55.7% 0.07 181.4)
-
Step 700
700 (this color)
#306D63
oklch(49.1% 0.065 181.3)
-
Step 800
800
#295951
oklch(42.8% 0.054 181.4)
-
Step 900
900
#264943
oklch(37.7% 0.042 181.6)
-
Step 950
950
#172B27
oklch(27.1% 0.027 180)
#306D63 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) | #696763 | 0.070 |
| Deuteranopia (no green cones) | #5F6064 | 0.066 |
| Tritanopia (no blue cones) | #0A6F6A | 0.020 |
| Achromatopsia (no color) | #636363 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306D63
#306D63
oklch(49.1% 0.065 181.3)
- #80515E
#80515E
oklch(49.2% 0.065 1.8)
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 #306D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.028
- Deep Turquoise #017374 ΔE 0.030
- Dark Aqua #05696B ΔE 0.030
- Dark Green Blue #1F6357 ΔE 0.038
- Bluegreen #017A79 ΔE 0.044
- Deep Aqua #08787F ΔE 0.047
- Slate #516572 ΔE 0.054
- Petrol #005F6A ΔE 0.059
Use #306D63 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.