#309E89
Closest named color: Persian Green (#2A9D8F). oklch(63.3% 0.103 177.3), rgb(48, 158, 137).
Aa
Black text reads best on this color (6.37:1).
About this color
#309E89 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.103 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Persian Green (#2A9D8F), ΔE 0.011 away. Black text reads best on it, at 6.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Persian Green (#2A9D8F) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #309E89 |
| RGB | rgb(48, 158, 137) |
| HSL | hsl(169, 53%, 40%) |
| OKLCH | oklch(63.3% 0.103 177.3) |
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 #309E89 | 3.29:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #309E89 | 6.37:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #309E89 text on white | 3.29:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #309E89 text on black | 6.37:1 | AA | Lc -41.8 | 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
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C7E0D9
oklch(88.6% 0.028 177)
-
Step 300
300
#9FCCC0
oklch(81% 0.05 176.9)
-
Step 400
400
#66B1A0
oklch(70.7% 0.08 177.6)
-
Step 500
500 (this color)
#309E89
oklch(63.3% 0.103 177.3)
-
Step 600
600
#008772
oklch(55.7% 0.104 176.6)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#074D41
oklch(37.7% 0.067 177.2)
-
Step 950
950
#092D26
oklch(26.9% 0.043 177.4)
#309E89 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) | #989488 | 0.108 |
| Deuteranopia (no green cones) | #88898B | 0.103 |
| Tritanopia (no blue cones) | #00A098 | 0.023 |
| Achromatopsia (no color) | #8E8E8E | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309E89
#309E89
oklch(63.3% 0.103 177.3)
- #BB6F8A
#BB6F8A
oklch(63.3% 0.101 357.6)
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 #309E89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Persian Green #2A9D8F ΔE 0.011
- Blue Green #0F9B8E ΔE 0.018
- Sea #3C9992 ΔE 0.024
- Ocean Green #3D9973 ΔE 0.030
- Grey Teal #5E9B8A ΔE 0.036
- Dull Teal #5F9E8F ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.042
- Teal Green #0A9396 ΔE 0.047
Use #309E89 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.