#5BB9D4
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(73.9% 0.097 219.2), rgb(91, 185, 212).
Aa
Black text reads best on this color (9.33:1).
About this color
#5BB9D4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.097 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.050 away. Black text reads best on it, at 9.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.33:1 |
| White text | 2.24:1 |
Values
| HEX | #5BB9D4 |
| RGB | rgb(91, 185, 212) |
| HSL | hsl(193, 58%, 59%) |
| OKLCH | oklch(73.9% 0.097 219.2) |
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 #5BB9D4 | 2.24:1 | Fails | Lc -48.9 | Large or bold text, headings |
| Black text on #5BB9D4 | 9.33:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #5BB9D4 text on white | 2.24:1 | Fails | Lc 44.1 | Non-text elements, placeholder text |
| #5BB9D4 text on black | 9.33:1 | AAA | Lc -58.0 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF2
oklch(93.6% 0.017 219.7)
-
Step 200
200
#C2DFE8
oklch(88.5% 0.033 218.4)
-
Step 300
300
#95CBDB
oklch(81% 0.06 218.1)
-
Step 400
400 (this color)
#5BB9D4
oklch(73.9% 0.097 219.2)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#5BB9D4 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) | #A8B4D5 | 0.082 |
| Deuteranopia (no green cones) | #96A7D4 | 0.074 |
| Tritanopia (no blue cones) | #00C2C1 | 0.056 |
| Achromatopsia (no color) | #ADADAD | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB9D4
#5BB9D4
oklch(73.9% 0.097 219.2)
- #DF957D
#DF957D
oklch(73.8% 0.096 38.7)
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 #5BB9D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.052
- Deep Sky Blue #00BFFF ΔE 0.065
- Dark Turquoise #00CED1 ΔE 0.065
- Lightblue #7BC8F6 ΔE 0.068
- Light Cornflower Blue #98C1D9 ΔE 0.068
- Bright Sky Blue #02CCFE ΔE 0.069
- Light Grey Blue #9DBCD4 ΔE 0.069
Use #5BB9D4 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.