#309D80
Closest named color: Ocean Green (#3D9973). oklch(62.7% 0.107 171.3), rgb(48, 157, 128).
Aa
Black text reads best on this color (6.26:1).
About this color
#309D80 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.107 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Green (#3D9973), ΔE 0.018 away. Black text reads best on it, at 6.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Ocean Green (#3D9973) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #309D80 |
| RGB | rgb(48, 157, 128) |
| HSL | hsl(164, 53%, 40%) |
| OKLCH | oklch(62.7% 0.107 171.3) |
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 #309D80 | 3.35:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #309D80 | 6.26:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #309D80 text on white | 3.35:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #309D80 text on black | 6.26:1 | AA | Lc -41.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E0EDE8
oklch(93.5% 0.015 171)
-
Step 200
200
#C7E0D7
oklch(88.6% 0.029 172)
-
Step 300
300
#9FCCBC
oklch(80.9% 0.052 171.2)
-
Step 400
400
#67B29A
oklch(70.8% 0.084 171.2)
-
Step 500
500 (this color)
#309D80
oklch(62.7% 0.107 171.3)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#094D3D
oklch(37.6% 0.069 171.9)
-
Step 950
950
#0A2D24
oklch(26.9% 0.043 172.7)
#309D80 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) | #98937F | 0.109 |
| Deuteranopia (no green cones) | #898882 | 0.105 |
| Tritanopia (no blue cones) | #009E95 | 0.031 |
| Achromatopsia (no color) | #8C8C8C | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309D80
#309D80
oklch(62.7% 0.107 171.3)
- #B96C90
#B96C90
oklch(62.7% 0.107 351.2)
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 #309D80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Green #3D9973 ΔE 0.018
- Persian Green #2A9D8F ΔE 0.022
- Blue Green #0F9B8E ΔE 0.025
- Sea #3C9992 ΔE 0.035
- Jade #1FA774 ΔE 0.040
- Grey Teal #5E9B8A ΔE 0.041
- Dusty Teal #4C9085 ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.046
Use #309D80 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.