#439DB3
Closest named color: Cadet Blue (#5F9EA0). oklch(65.1% 0.091 216.5), rgb(67, 157, 179).
Aa
Black text reads best on this color (6.71:1).
About this color
#439DB3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.091 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.036 away. Black text reads best on it, at 6.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #439DB3 |
| RGB | rgb(67, 157, 179) |
| HSL | hsl(192, 46%, 48%) |
| OKLCH | oklch(65.1% 0.091 216.5) |
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 #439DB3 | 3.12:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #439DB3 | 6.71:1 | AA | Lc 46.0 | Large or bold text, headings |
| #439DB3 text on white | 3.12:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #439DB3 text on black | 6.71:1 | AA | Lc -43.7 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE4
oklch(88.6% 0.025 215.9)
-
Step 300
300
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6BACBD
oklch(70.7% 0.071 216.3)
-
Step 500
500 (this color)
#439DB3
oklch(65.1% 0.091 216.5)
-
Step 600
600
#038198
oklch(55.6% 0.098 216.2)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#01596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#124956
oklch(37.7% 0.059 217.2)
-
Step 950
950
#0D2B32
oklch(27% 0.037 215.6)
#439DB3 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) | #8E98B4 | 0.080 |
| Deuteranopia (no green cones) | #7E8CB3 | 0.073 |
| Tritanopia (no blue cones) | #00A5A4 | 0.045 |
| Achromatopsia (no color) | #929292 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #439DB3
#439DB3
oklch(65.1% 0.091 216.5)
- #C07B68
#C07B68
oklch(65.1% 0.091 36.1)
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 #439DB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.036
- Sea #3C9992 ΔE 0.050
- Greyblue #77A1B5 ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.056
- Dull Teal #5F9E8F ΔE 0.058
- Teal Green #0A9396 ΔE 0.059
- Faded Blue #658CBB ΔE 0.059
- Persian Green #2A9D8F ΔE 0.060
Use #439DB3 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.