#129FB8
Closest named color: Turquoise Blue (#06B1C4). oklch(64.7% 0.111 214.5), rgb(18, 159, 184).
Aa
Black text reads best on this color (6.67:1).
About this color
#129FB8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.111 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.051 away. Black text reads best on it, at 6.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.67:1 |
| White text | 3.14:1 |
Values
| HEX | #129FB8 |
| RGB | rgb(18, 159, 184) |
| HSL | hsl(189, 82%, 40%) |
| OKLCH | oklch(64.7% 0.111 214.5) |
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 #129FB8 | 3.14:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #129FB8 | 6.67:1 | AA | Lc 46.1 | Large or bold text, headings |
| #129FB8 text on white | 3.14:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #129FB8 text on black | 6.67:1 | AA | Lc -43.8 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DFEDF0
oklch(93.7% 0.015 212)
-
Step 200
200
#C4DFE6
oklch(88.6% 0.03 215.1)
-
Step 300
300
#99CAD6
oklch(80.9% 0.054 214.4)
-
Step 400
400
#59AFC2
oklch(70.8% 0.087 214)
-
Step 500
500 (this color)
#129FB8
oklch(64.7% 0.111 214.5)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#022C34
oklch(27% 0.046 213.8)
#129FB8 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) | #8D9AB9 | 0.099 |
| Deuteranopia (no green cones) | #798BB8 | 0.089 |
| Tritanopia (no blue cones) | #00A8A7 | 0.043 |
| Achromatopsia (no color) | #919191 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129FB8
#129FB8
oklch(64.7% 0.111 214.5)
- #C87460
#C87460
oklch(64.7% 0.111 34.3)
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 #129FB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.051
- Cadet Blue #5F9EA0 ΔE 0.053
- Sea #3C9992 ΔE 0.055
- Teal Green #0A9396 ΔE 0.056
- Persian Green #2A9D8F ΔE 0.061
- Blue NCS #118AB2 ΔE 0.061
- Blue Green #0F9B8E ΔE 0.063
- Light Sea Green #20B2AA ΔE 0.067
Use #129FB8 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.