#439E9B
Closest named color: Sea (#3C9992). oklch(64.4% 0.086 192.3), rgb(67, 158, 155).
Aa
Black text reads best on this color (6.60:1).
About this color
#439E9B is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.086 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.019 away. Black text reads best on it, at 6.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.60:1 |
| White text | 3.18:1 |
Values
| HEX | #439E9B |
| RGB | rgb(67, 158, 155) |
| HSL | hsl(178, 40%, 44%) |
| OKLCH | oklch(64.4% 0.086 192.3) |
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 #439E9B | 3.18:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #439E9B | 6.60:1 | AA | Lc 45.3 | Large or bold text, headings |
| #439E9B text on white | 3.18:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #439E9B text on black | 6.60:1 | AA | Lc -43.0 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEC
oklch(93.7% 0.013 190.9)
-
Step 200
200
#C8DEDD
oklch(88.4% 0.023 193.4)
-
Step 300
300
#A2CAC8
oklch(81% 0.042 192.6)
-
Step 400
400
#6DAEAB
oklch(70.6% 0.067 192)
-
Step 500
500 (this color)
#439E9B
oklch(64.4% 0.086 192.3)
-
Step 600
600
#0A8482
oklch(55.5% 0.093 192.9)
-
Step 700
700
#006F6D
oklch(49% 0.084 192.6)
-
Step 800
800
#045B59
oklch(42.6% 0.072 192.2)
-
Step 900
900
#134B49
oklch(37.7% 0.056 191.6)
-
Step 950
950
#0E2C2B
oklch(27% 0.036 192.3)
#439E9B 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) | #95979B | 0.090 |
| Deuteranopia (no green cones) | #868C9C | 0.084 |
| Tritanopia (no blue cones) | #00A29D | 0.025 |
| Achromatopsia (no color) | #909090 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #439E9B
#439E9B
oklch(64.4% 0.086 192.3)
- #BB777F
#BB777F
oklch(64.3% 0.086 12.1)
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 #439E9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.019
- Persian Green #2A9D8F ΔE 0.025
- Cadet Blue #5F9EA0 ΔE 0.026
- Dull Teal #5F9E8F ΔE 0.028
- Grey Teal #5E9B8A ΔE 0.030
- Blue Green #0F9B8E ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.044
- Teal Green #0A9396 ΔE 0.045
Use #439E9B 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.