#12C09F
Closest named color: Green Blue (#01C08D). oklch(72.2% 0.135 174.2), rgb(18, 192, 159).
Aa
Black text reads best on this color (9.06:1).
About this color
#12C09F is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.135 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Green Blue (#01C08D), ΔE 0.026 away. Black text reads best on it, at 9.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Green Blue (#01C08D) |
| Black text | 9.06:1 |
| White text | 2.31:1 |
Values
| HEX | #12C09F |
| RGB | rgb(18, 192, 159) |
| HSL | hsl(169, 83%, 41%) |
| OKLCH | oklch(72.2% 0.135 174.2) |
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 #12C09F | 2.31:1 | Fails | Lc -49.9 | Large or bold text, headings |
| Black text on #12C09F | 9.06:1 | AAA | Lc 58.9 | Large or bold text, headings |
| #12C09F text on white | 2.31:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #12C09F text on black | 9.06:1 | AAA | Lc -57.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF8F5
oklch(97.1% 0.011 176.3)
-
Step 100
100
#DAF0E9
oklch(93.7% 0.025 174.7)
-
Step 200
200
#BAE4D7
oklch(88.5% 0.047 174.4)
-
Step 300
300
#84D3BD
oklch(80.9% 0.085 174.5)
-
Step 400
400 (this color)
#12C09F
oklch(72.2% 0.135 174.2)
-
Step 500
500
#00A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876F
oklch(55.6% 0.106 174.3)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#12C09F 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) | #B9B39D | 0.140 |
| Deuteranopia (no green cones) | #A5A4A1 | 0.134 |
| Tritanopia (no blue cones) | #00C2B6 | 0.032 |
| Achromatopsia (no color) | #AAAAAA | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12C09F
#12C09F
oklch(72.2% 0.135 174.2)
- #E67FAB
#E67FAB
oklch(72.2% 0.136 354)
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 #12C09F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Blue #01C08D ΔE 0.026
- Topaz #13BBAF ΔE 0.031
- Greenblue #23C48B ΔE 0.033
- Greeny Blue #42B395 ΔE 0.036
- Light Sea Green #20B2AA ΔE 0.049
- Dark Seafoam #1FB57A ΔE 0.052
- Green Teal #0CB577 ΔE 0.056
- Bluey Green #2BB179 ΔE 0.057
Use #12C09F 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.