#309A89
Closest named color: Persian Green (#2A9D8F). oklch(62.2% 0.098 180), rgb(48, 154, 137).
Aa
Black text reads best on this color (6.10:1).
About this color
#309A89 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.098 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Persian Green (#2A9D8F), ΔE 0.010 away. Black text reads best on it, at 6.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Persian Green (#2A9D8F) |
| Black text | 6.10:1 |
| White text | 3.43:1 |
Values
| HEX | #309A89 |
| RGB | rgb(48, 154, 137) |
| HSL | hsl(170, 52%, 40%) |
| OKLCH | oklch(62.2% 0.098 180) |
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 #309A89 | 3.43:1 | AA large text | Lc -67.0 | Content text, not long reading |
| Black text on #309A89 | 6.10:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #309A89 text on white | 3.43:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #309A89 text on black | 6.10:1 | AA | Lc -40.1 | 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
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C7DFDA
oklch(88.4% 0.026 181.8)
-
Step 300
300
#A0CBC2
oklch(80.9% 0.047 180.9)
-
Step 400
400
#67B1A2
oklch(70.8% 0.078 179.4)
-
Step 500
500 (this color)
#309A89
oklch(62.2% 0.098 180)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005D51
oklch(42.9% 0.078 180)
-
Step 900
900
#0A4C43
oklch(37.6% 0.064 181)
-
Step 950
950
#0B2D27
oklch(27.1% 0.041 179.3)
#309A89 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) | #939188 | 0.103 |
| Deuteranopia (no green cones) | #84868A | 0.098 |
| Tritanopia (no blue cones) | #009D95 | 0.019 |
| Achromatopsia (no color) | #8A8A8A | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309A89
#309A89
oklch(62.2% 0.098 180)
- #B76D84
#B76D84
oklch(62.2% 0.098 0.3)
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 #309A89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Persian Green #2A9D8F ΔE 0.010
- Blue Green #0F9B8E ΔE 0.012
- Sea #3C9992 ΔE 0.018
- Ocean Green #3D9973 ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.032
- Teal Green #0A9396 ΔE 0.036
- Grey Teal #5E9B8A ΔE 0.037
- Dull Teal #5F9E8F ΔE 0.042
Use #309A89 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.