#129DA5
Closest named color: Sea (#3C9992). oklch(63.4% 0.105 201.4), rgb(18, 157, 165).
Aa
Black text reads best on this color (6.39:1).
About this color
#129DA5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.105 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.029 away. Black text reads best on it, at 6.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.39:1 |
| White text | 3.28:1 |
Values
| HEX | #129DA5 |
| RGB | rgb(18, 157, 165) |
| HSL | hsl(183, 80%, 36%) |
| OKLCH | oklch(63.4% 0.105 201.4) |
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 #129DA5 | 3.28:1 | AA large text | Lc -65.1 | Content text, not long reading |
| Black text on #129DA5 | 6.39:1 | AA | Lc 44.4 | Non-text elements, placeholder text |
| #129DA5 text on white | 3.28:1 | AA large text | Lc 59.7 | Large or bold text, headings |
| #129DA5 text on black | 6.39:1 | AA | Lc -42.0 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DFEDEE
oklch(93.6% 0.015 202)
-
Step 200
200
#C4DFE1
oklch(88.4% 0.029 202.1)
-
Step 300
300
#9ACBCE
oklch(80.9% 0.051 200.9)
-
Step 400
400
#5CB0B6
oklch(70.7% 0.082 201.6)
-
Step 500
500 (this color)
#129DA5
oklch(63.4% 0.105 201.4)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#032D2F
oklch(27.1% 0.044 199.7)
#129DA5 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) | #9096A6 | 0.106 |
| Deuteranopia (no green cones) | #7D88A6 | 0.098 |
| Tritanopia (no blue cones) | #00A49F | 0.025 |
| Achromatopsia (no color) | #8E8E8E | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129DA5
#129DA5
oklch(63.4% 0.105 201.4)
- #C26F6E
#C26F6E
oklch(63.4% 0.106 21.2)
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 #129DA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.029
- Teal Green #0A9396 ΔE 0.033
- Persian Green #2A9D8F ΔE 0.033
- Blue Green #0F9B8E ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.047
- Dusty Teal #4C9085 ΔE 0.053
- Dull Teal #5F9E8F ΔE 0.054
- Grey Teal #5E9B8A ΔE 0.055
Use #129DA5 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.