#3BB9C4
Closest named color: Turquoise Blue (#06B1C4). oklch(72.3% 0.108 203.6), rgb(59, 185, 196).
Aa
Black text reads best on this color (8.92:1).
About this color
#3BB9C4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.108 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.031 away. Black text reads best on it, at 8.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.92:1 |
| White text | 2.35:1 |
Values
| HEX | #3BB9C4 |
| RGB | rgb(59, 185, 196) |
| HSL | hsl(185, 54%, 50%) |
| OKLCH | oklch(72.3% 0.108 203.6) |
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 #3BB9C4 | 2.35:1 | Fails | Lc -51.0 | Large or bold text, headings |
| Black text on #3BB9C4 | 8.92:1 | AAA | Lc 57.9 | Large or bold text, headings |
| #3BB9C4 text on white | 2.35:1 | Fails | Lc 46.0 | Large or bold text, headings |
| #3BB9C4 text on black | 8.92:1 | AAA | Lc -56.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DCEEF0
oklch(93.6% 0.019 204.8)
-
Step 200
200
#BDE1E4
oklch(88.5% 0.038 202.7)
-
Step 300
300
#8CCED4
oklch(80.9% 0.067 203.1)
-
Step 400
400 (this color)
#3BB9C4
oklch(72.3% 0.108 203.6)
-
Step 500
500
#009CA7
oklch(63.1% 0.108 203.6)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#3BB9C4 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) | #AAB1C5 | 0.107 |
| Deuteranopia (no green cones) | #97A3C4 | 0.099 |
| Tritanopia (no blue cones) | #00C0BC | 0.030 |
| Achromatopsia (no color) | #A9A9A9 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3BB9C4
#3BB9C4
oklch(72.3% 0.108 203.6)
- #E18A85
#E18A85
oklch(72.3% 0.107 23.6)
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 #3BB9C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.031
- Topaz #13BBAF ΔE 0.038
- Light Sea Green #20B2AA ΔE 0.043
- Dark Turquoise #00CED1 ΔE 0.056
- Greeny Blue #42B395 ΔE 0.066
- Medium Turquoise #48D1CC ΔE 0.069
- Vivid Sky Blue #4CC9F0 ΔE 0.072
- Greyblue #77A1B5 ΔE 0.074
Use #3BB9C4 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.