#439FA9
Closest named color: Cadet Blue (#5F9EA0). oklch(65.2% 0.087 205.1), rgb(67, 159, 169).
Aa
Black text reads best on this color (6.77:1).
About this color
#439FA9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.087 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.025 away. Black text reads best on it, at 6.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.77:1 |
| White text | 3.10:1 |
Values
| HEX | #439FA9 |
| RGB | rgb(67, 159, 169) |
| HSL | hsl(186, 43%, 46%) |
| OKLCH | oklch(65.2% 0.087 205.1) |
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 #439FA9 | 3.10:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #439FA9 | 6.77:1 | AA | Lc 46.3 | Large or bold text, headings |
| #439FA9 text on white | 3.10:1 | AA large text | Lc 57.7 | Large or bold text, headings |
| #439FA9 text on black | 6.77:1 | AA | Lc -44.0 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE1
oklch(88.5% 0.024 206.6)
-
Step 300
300
#A1C9CE
oklch(80.9% 0.043 205.7)
-
Step 400
400
#6BADB5
oklch(70.6% 0.068 205.6)
-
Step 500
500 (this color)
#439FA9
oklch(65.2% 0.087 205.1)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#114A50
oklch(37.7% 0.057 205.4)
-
Step 950
950
#0D2B2F
oklch(26.9% 0.036 207.2)
#439FA9 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) | #9399AA | 0.086 |
| Deuteranopia (no green cones) | #838DA9 | 0.079 |
| Tritanopia (no blue cones) | #00A5A2 | 0.033 |
| Achromatopsia (no color) | #929292 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #439FA9
#439FA9
oklch(65.2% 0.087 205.1)
- #BF7A75
#BF7A75
oklch(65.1% 0.087 24.3)
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 #439FA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.025
- Sea #3C9992 ΔE 0.036
- Dull Teal #5F9E8F ΔE 0.042
- Persian Green #2A9D8F ΔE 0.044
- Grey Teal #5E9B8A ΔE 0.046
- Blue Green #0F9B8E ΔE 0.051
- Teal Green #0A9396 ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.055
Use #439FA9 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.