#3BBDE4
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(74.5% 0.122 222.5), rgb(59, 189, 228).
Aa
Black text reads best on this color (9.58:1).
About this color
#3BBDE4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.122 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.037 away. Black text reads best on it, at 9.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.58:1 |
| White text | 2.19:1 |
Values
| HEX | #3BBDE4 |
| RGB | rgb(59, 189, 228) |
| HSL | hsl(194, 76%, 56%) |
| OKLCH | oklch(74.5% 0.122 222.5) |
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 #3BBDE4 | 2.19:1 | Fails | Lc -47.4 | Large or bold text, headings |
| Black text on #3BBDE4 | 9.58:1 | AAA | Lc 61.2 | Content text, not long reading |
| #3BBDE4 text on white | 2.19:1 | Fails | Lc 42.7 | Non-text elements, placeholder text |
| #3BBDE4 text on black | 9.58:1 | AAA | Lc -59.5 | 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
#EEF7FA
oklch(97% 0.01 219.6)
-
Step 100
100
#DBEEF5
oklch(93.7% 0.022 221.8)
-
Step 200
200
#BCE0EE
oklch(88.5% 0.042 223.4)
-
Step 300
300
#88CCE4
oklch(80.8% 0.076 222.2)
-
Step 400
400 (this color)
#3BBDE4
oklch(74.5% 0.122 222.5)
-
Step 500
500
#0098BC
oklch(63% 0.117 222.5)
-
Step 600
600
#00809F
oklch(55.6% 0.103 222.6)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#002C38
oklch(27.2% 0.05 221.4)
#3BBDE4 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) | #A6B8E6 | 0.097 |
| Deuteranopia (no green cones) | #90A8E4 | 0.087 |
| Tritanopia (no blue cones) | #00C9CA | 0.060 |
| Achromatopsia (no color) | #AFAFAF | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3BBDE4
#3BBDE4
oklch(74.5% 0.122 222.5)
- #ED916D
#ED916D
oklch(74.5% 0.122 42)
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 #3BBDE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.037
- Deep Sky Blue #00BFFF ΔE 0.039
- Bright Sky Blue #02CCFE ΔE 0.047
- Turquoise Blue #06B1C4 ΔE 0.058
- Dark Turquoise #00CED1 ΔE 0.063
- Lightblue #7BC8F6 ΔE 0.065
- Aqua Blue #02D8E9 ΔE 0.073
- Medium Turquoise #48D1CC ΔE 0.076
Use #3BBDE4 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.