#109B99
Closest named color: Blue Green (#0F9B8E). oklch(62.5% 0.105 193.2), rgb(16, 155, 153).
Aa
Black text reads best on this color (6.17:1).
About this color
#109B99 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.105 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Green (#0F9B8E), ΔE 0.017 away. Black text reads best on it, at 6.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Blue Green (#0F9B8E) |
| Black text | 6.17:1 |
| White text | 3.40:1 |
Values
| HEX | #109B99 |
| RGB | rgb(16, 155, 153) |
| HSL | hsl(179, 81%, 34%) |
| OKLCH | oklch(62.5% 0.105 193.2) |
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 #109B99 | 3.40:1 | AA large text | Lc -66.5 | Content text, not long reading |
| Black text on #109B99 | 6.17:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #109B99 text on white | 3.40:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #109B99 text on black | 6.17:1 | AA | Lc -40.7 | 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
#DFEDEC
oklch(93.5% 0.015 191.8)
-
Step 200
200
#C5DFDE
oklch(88.4% 0.028 193.8)
-
Step 300
300
#9BCCCA
oklch(81% 0.051 193.1)
-
Step 400
400
#5DB1AF
oklch(70.7% 0.082 193.4)
-
Step 500
500 (this color)
#109B99
oklch(62.5% 0.105 193.2)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#042D2C
oklch(27% 0.043 192.4)
#109B99 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) | #909399 | 0.109 |
| Deuteranopia (no green cones) | #7F869A | 0.102 |
| Tritanopia (no blue cones) | #00A09A | 0.015 |
| Achromatopsia (no color) | #8B8B8B | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #109B99
#109B99
oklch(62.5% 0.105 193.2)
- #BE6C75
#BE6C75
oklch(62.5% 0.105 13.5)
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 #109B99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Green #0F9B8E ΔE 0.017
- Sea #3C9992 ΔE 0.019
- Persian Green #2A9D8F ΔE 0.019
- Teal Green #0A9396 ΔE 0.024
- Dusty Teal #4C9085 ΔE 0.042
- Dark Cyan #008B8B ΔE 0.049
- Grey Teal #5E9B8A ΔE 0.049
- Dull Teal #5F9E8F ΔE 0.051
Use #109B99 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.