#4BB9DD
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(73.7% 0.111 223.2), rgb(75, 185, 221).
Aa
Black text reads best on this color (9.28:1).
About this color
#4BB9DD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.111 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.046 away. Black text reads best on it, at 9.28:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.28:1 |
| White text | 2.26:1 |
Values
| HEX | #4BB9DD |
| RGB | rgb(75, 185, 221) |
| HSL | hsl(195, 68%, 58%) |
| OKLCH | oklch(73.7% 0.111 223.2) |
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 #4BB9DD | 2.26:1 | Fails | Lc -49.1 | Large or bold text, headings |
| Black text on #4BB9DD | 9.28:1 | AAA | Lc 59.7 | Large or bold text, headings |
| #4BB9DD text on white | 2.26:1 | Fails | Lc 44.3 | Non-text elements, placeholder text |
| #4BB9DD text on black | 9.28:1 | AAA | Lc -57.8 | 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
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DCEDF4
oklch(93.6% 0.02 224.3)
-
Step 200
200
#BFDFEC
oklch(88.4% 0.038 224.3)
-
Step 300
300
#8FCBE2
oklch(80.9% 0.069 223.8)
-
Step 400
400 (this color)
#4BB9DD
oklch(73.7% 0.111 223.2)
-
Step 500
500
#0098BD
oklch(63.1% 0.118 223.1)
-
Step 600
600
#00809F
oklch(55.6% 0.103 222.6)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B38
oklch(26.8% 0.05 223.6)
#4BB9DD 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) | #A4B5DF | 0.088 |
| Deuteranopia (no green cones) | #90A6DD | 0.078 |
| Tritanopia (no blue cones) | #00C4C5 | 0.059 |
| Achromatopsia (no color) | #ACACAC | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4BB9DD
#4BB9DD
oklch(73.7% 0.111 223.2)
- #E59270
#E59270
oklch(73.7% 0.111 42.9)
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 #4BB9DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.046
- Deep Sky Blue #00BFFF ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.060
- Lightblue #7BC8F6 ΔE 0.068
- Dark Turquoise #00CED1 ΔE 0.069
- Greyblue #77A1B5 ΔE 0.077
- Topaz #13BBAF ΔE 0.078
Use #4BB9DD 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.