#12BCB3
Closest named color: Topaz (#13BBAF). oklch(71.8% 0.122 188.7), rgb(18, 188, 179).
Aa
Black text reads best on this color (8.86:1).
About this color
#12BCB3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.122 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.006 away. Black text reads best on it, at 8.86:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 8.86:1 |
| White text | 2.36:1 |
Values
| HEX | #12BCB3 |
| RGB | rgb(18, 188, 179) |
| HSL | hsl(177, 83%, 40%) |
| OKLCH | oklch(71.8% 0.122 188.7) |
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 #12BCB3 | 2.36:1 | Fails | Lc -51.0 | Large or bold text, headings |
| Black text on #12BCB3 | 8.86:1 | AAA | Lc 57.9 | Large or bold text, headings |
| #12BCB3 text on white | 2.36:1 | Fails | Lc 46.1 | Large or bold text, headings |
| #12BCB3 text on black | 8.86:1 | AAA | Lc -56.0 | 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
#EEF8F7
oklch(97.1% 0.011 189.8)
-
Step 100
100
#DAEFED
oklch(93.6% 0.022 189.9)
-
Step 200
200
#BAE3DF
oklch(88.6% 0.043 189.1)
-
Step 300
300
#85D1CA
oklch(80.9% 0.076 188.4)
-
Step 400
400 (this color)
#12BCB3
oklch(71.8% 0.122 188.7)
-
Step 500
500
#009E96
oklch(63% 0.109 188.5)
-
Step 600
600
#00857E
oklch(55.6% 0.097 188.3)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C57
oklch(42.8% 0.074 188.4)
-
Step 900
900
#004C48
oklch(37.6% 0.065 188.7)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#12BCB3 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) | #B1B1B3 | 0.130 |
| Deuteranopia (no green cones) | #9CA2B4 | 0.122 |
| Tritanopia (no blue cones) | #00C1B9 | 0.014 |
| Achromatopsia (no color) | #A8A8A8 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12BCB3
#12BCB3
oklch(71.8% 0.122 188.7)
- #E58294
#E58294
oklch(71.9% 0.123 9)
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 #12BCB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.006
- Light Sea Green #20B2AA ΔE 0.028
- Greeny Blue #42B395 ΔE 0.042
- Turquoise Blue #06B1C4 ΔE 0.047
- Dark Turquoise #00CED1 ΔE 0.058
- Green Blue #01C08D ΔE 0.060
- Greenblue #23C48B ΔE 0.068
- Medium Turquoise #48D1CC ΔE 0.069
Use #12BCB3 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.