#309DA2
Closest named color: Sea (#3C9992). oklch(63.8% 0.095 199.5), rgb(48, 157, 162).
Aa
Black text reads best on this color (6.47:1).
About this color
#309DA2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.095 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.023 away. Black text reads best on it, at 6.47:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.47:1 |
| White text | 3.24:1 |
Values
| HEX | #309DA2 |
| RGB | rgb(48, 157, 162) |
| HSL | hsl(183, 54%, 41%) |
| OKLCH | oklch(63.8% 0.095 199.5) |
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 #309DA2 | 3.24:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #309DA2 | 6.47:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #309DA2 text on white | 3.24:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #309DA2 text on black | 6.47:1 | AA | Lc -42.3 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDED
oklch(93.6% 0.014 196.9)
-
Step 200
200
#C6DFE0
oklch(88.6% 0.027 199.6)
-
Step 300
300
#9ECACC
oklch(80.8% 0.046 199.7)
-
Step 400
400
#64AFB3
oklch(70.7% 0.075 200.1)
-
Step 500
500 (this color)
#309DA2
oklch(63.8% 0.095 199.5)
-
Step 600
600
#008489
oklch(55.7% 0.095 199.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#054B4E
oklch(37.6% 0.062 199.6)
-
Step 950
950
#092C2E
oklch(27% 0.039 200.6)
#309DA2 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) | #9296A2 | 0.098 |
| Deuteranopia (no green cones) | #818AA3 | 0.090 |
| Tritanopia (no blue cones) | #00A39E | 0.023 |
| Achromatopsia (no color) | #8F8F8F | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309DA2
#309DA2
oklch(63.8% 0.095 199.5)
- #BF7374
#BF7374
oklch(63.8% 0.096 19.2)
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 #309DA2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.023
- Persian Green #2A9D8F ΔE 0.030
- Blue Green #0F9B8E ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.036
- Teal Green #0A9396 ΔE 0.037
- Dull Teal #5F9E8F ΔE 0.043
- Grey Teal #5E9B8A ΔE 0.044
- Dusty Teal #4C9085 ΔE 0.048
Use #309DA2 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.