#1BB9EC
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.4% 0.138 227.3), rgb(27, 185, 236).
Aa
Black text reads best on this color (9.19:1).
About this color
#1BB9EC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.138 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.029 away. Black text reads best on it, at 9.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.19:1 |
| White text | 2.28:1 |
Values
| HEX | #1BB9EC |
| RGB | rgb(27, 185, 236) |
| HSL | hsl(195, 85%, 52%) |
| OKLCH | oklch(73.4% 0.138 227.3) |
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 #1BB9EC | 2.28:1 | Fails | Lc -49.3 | Large or bold text, headings |
| Black text on #1BB9EC | 9.19:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #1BB9EC text on white | 2.28:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #1BB9EC text on black | 9.19:1 | AAA | Lc -57.7 | 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
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#D9EEF7
oklch(93.6% 0.025 225.3)
-
Step 200
200
#B9E0F2
oklch(88.5% 0.048 227.6)
-
Step 300
300
#82CCEC
oklch(80.8% 0.086 227.3)
-
Step 400
400 (this color)
#1BB9EC
oklch(73.4% 0.138 227.3)
-
Step 500
500
#0097C3
oklch(63.1% 0.123 227.5)
-
Step 600
600
#007FA4
oklch(55.6% 0.108 227.1)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#004960
oklch(37.8% 0.073 227.3)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#1BB9EC 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) | #9EB6EE | 0.100 |
| Deuteranopia (no green cones) | #84A4EB | 0.085 |
| Tritanopia (no blue cones) | #00C8CA | 0.075 |
| Achromatopsia (no color) | #ABABAB | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB9EC
#1BB9EC
oklch(73.4% 0.138 227.3)
- #EE8C58
#EE8C58
oklch(73.4% 0.137 47.6)
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 #1BB9EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.029
- Vivid Sky Blue #4CC9F0 ΔE 0.052
- Bright Sky Blue #02CCFE ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.060
- Lightblue #7BC8F6 ΔE 0.078
- Dark Turquoise #00CED1 ΔE 0.081
- Carolina Blue #8AB8FE ΔE 0.084
- Sky #82CAFC ΔE 0.088
Use #1BB9EC 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.