#1BB5E1
Closest named color: Turquoise Blue (#06B1C4). oklch(72% 0.131 224.2), rgb(27, 181, 225).
Aa
Black text reads best on this color (8.74:1).
About this color
#1BB5E1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.131 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.043 away. Black text reads best on it, at 8.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.74:1 |
| White text | 2.40:1 |
Values
| HEX | #1BB5E1 |
| RGB | rgb(27, 181, 225) |
| HSL | hsl(193, 79%, 49%) |
| OKLCH | oklch(72% 0.131 224.2) |
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 #1BB5E1 | 2.40:1 | Fails | Lc -51.7 | Large or bold text, headings |
| Black text on #1BB5E1 | 8.74:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #1BB5E1 text on white | 2.40:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #1BB5E1 text on black | 8.74:1 | AAA | Lc -55.3 | 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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DAEEF6
oklch(93.7% 0.024 223.7)
-
Step 200
200
#BAE0F0
oklch(88.5% 0.046 225.3)
-
Step 300
300
#84CCE8
oklch(80.8% 0.082 224.6)
-
Step 400
400 (this color)
#1BB5E1
oklch(72% 0.131 224.2)
-
Step 500
500
#0098BE
oklch(63.1% 0.118 223.7)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
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
#002B39
oklch(26.9% 0.051 225.5)
#1BB5E1 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) | #9CB1E3 | 0.101 |
| Deuteranopia (no green cones) | #84A0E1 | 0.088 |
| Tritanopia (no blue cones) | #00C2C3 | 0.066 |
| Achromatopsia (no color) | #A7A7A7 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB5E1
#1BB5E1
oklch(72% 0.131 224.2)
- #E8885D
#E8885D
oklch(72.1% 0.131 44.3)
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 #1BB5E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.043
- Deep Sky Blue #00BFFF ΔE 0.046
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Bright Sky Blue #02CCFE ΔE 0.067
- Light Sea Green #20B2AA ΔE 0.081
- Dark Turquoise #00CED1 ΔE 0.081
- Topaz #13BBAF ΔE 0.082
- Greyblue #77A1B5 ΔE 0.084
Use #1BB5E1 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.