#129FA7
Closest named color: Sea (#3C9992). oklch(64% 0.106 201.3), rgb(18, 159, 167).
Aa
Black text reads best on this color (6.54:1).
About this color
#129FA7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.106 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.032 away. Black text reads best on it, at 6.54:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.54:1 |
| White text | 3.20:1 |
Values
| HEX | #129FA7 |
| RGB | rgb(18, 159, 167) |
| HSL | hsl(183, 81%, 36%) |
| OKLCH | oklch(64% 0.106 201.3) |
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 #129FA7 | 3.20:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #129FA7 | 6.54:1 | AA | Lc 45.3 | Large or bold text, headings |
| #129FA7 text on white | 3.20:1 | AA large text | Lc 58.8 | Large or bold text, headings |
| #129FA7 text on black | 6.54:1 | AA | Lc -42.9 | 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
#99CBCF
oklch(80.8% 0.052 202.3)
-
Step 400
400
#5BB0B6
oklch(70.7% 0.083 201.5)
-
Step 500
500 (this color)
#129FA7
oklch(64% 0.106 201.3)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005A5F
oklch(42.5% 0.072 201.4)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#032D2F
oklch(27.1% 0.044 199.7)
#129FA7 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) | #9297A8 | 0.108 |
| Deuteranopia (no green cones) | #7F8AA8 | 0.099 |
| Tritanopia (no blue cones) | #00A6A1 | 0.025 |
| Achromatopsia (no color) | #909090 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129FA7
#129FA7
oklch(64% 0.106 201.3)
- #C57170
#C57170
oklch(64.1% 0.107 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 #129FA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.032
- Persian Green #2A9D8F ΔE 0.035
- Blue Green #0F9B8E ΔE 0.037
- Teal Green #0A9396 ΔE 0.039
- Cadet Blue #5F9EA0 ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.053
- Grey Teal #5E9B8A ΔE 0.055
- Light Sea Green #20B2AA ΔE 0.057
Use #129FA7 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.