#439CB1
Closest named color: Cadet Blue (#5F9EA0). oklch(64.7% 0.089 215.8), rgb(67, 156, 177).
Aa
Black text reads best on this color (6.62:1).
About this color
#439CB1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.089 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.035 away. Black text reads best on it, at 6.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.62:1 |
| White text | 3.16:1 |
Values
| HEX | #439CB1 |
| RGB | rgb(67, 156, 177) |
| HSL | hsl(191, 45%, 48%) |
| OKLCH | oklch(64.7% 0.089 215.8) |
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 #439CB1 | 3.16:1 | AA large text | Lc -64.0 | Content text, not long reading |
| Black text on #439CB1 | 6.62:1 | AA | Lc 45.5 | Large or bold text, headings |
| #439CB1 text on white | 3.16:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #439CB1 text on black | 6.62:1 | AA | Lc -43.2 | 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
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6CACBC
oklch(70.7% 0.069 215.4)
-
Step 500
500 (this color)
#439CB1
oklch(64.7% 0.089 215.8)
-
Step 600
600
#088197
oklch(55.6% 0.097 215.5)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#035969
oklch(42.8% 0.075 215.6)
-
Step 900
900
#134955
oklch(37.7% 0.058 215.8)
-
Step 950
950
#0E2B32
oklch(27.1% 0.037 216.1)
#439CB1 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) | #8D97B2 | 0.079 |
| Deuteranopia (no green cones) | #7D8BB1 | 0.072 |
| Tritanopia (no blue cones) | #00A4A2 | 0.045 |
| Achromatopsia (no color) | #919191 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #439CB1
#439CB1
oklch(64.7% 0.089 215.8)
- #BE7A68
#BE7A68
oklch(64.6% 0.09 35.5)
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 #439CB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.035
- Sea #3C9992 ΔE 0.047
- Greyblue #77A1B5 ΔE 0.054
- Teal Green #0A9396 ΔE 0.056
- Dull Teal #5F9E8F ΔE 0.056
- Persian Green #2A9D8F ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.058
- Blue Grey #758DA3 ΔE 0.059
Use #439CB1 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.