#2BB1EB
Closest named color: Deep Sky Blue (#00BFFF). oklch(71.7% 0.137 233), rgb(43, 177, 235).
Aa
Black text reads best on this color (8.59:1).
About this color
#2BB1EB is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.137 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.042 away. Black text reads best on it, at 8.59:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.59:1 |
| White text | 2.44:1 |
Values
| HEX | #2BB1EB |
| RGB | rgb(43, 177, 235) |
| HSL | hsl(198, 83%, 55%) |
| OKLCH | oklch(71.7% 0.137 233) |
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 #2BB1EB | 2.44:1 | Fails | Lc -52.6 | Large or bold text, headings |
| Black text on #2BB1EB | 8.59:1 | AAA | Lc 56.4 | Large or bold text, headings |
| #2BB1EB text on white | 2.44:1 | Fails | Lc 47.6 | Large or bold text, headings |
| #2BB1EB text on black | 8.59:1 | AAA | Lc -54.4 | 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
#DAEDF8
oklch(93.5% 0.025 233)
-
Step 200
200
#BBDFF4
oklch(88.4% 0.048 233.7)
-
Step 300
300
#87CBEF
oklch(81% 0.085 232.4)
-
Step 400
400 (this color)
#2BB1EB
oklch(71.7% 0.137 233)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#2BB1EB 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) | #94AFEE | 0.087 |
| Deuteranopia (no green cones) | #7B9EEA | 0.073 |
| Tritanopia (no blue cones) | #00C0C5 | 0.081 |
| Achromatopsia (no color) | #A6A6A6 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2BB1EB
#2BB1EB
oklch(71.7% 0.137 233)
- #E6894A
#E6894A
oklch(71.7% 0.138 52.8)
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 #2BB1EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.042
- Turquoise Blue #06B1C4 ΔE 0.061
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Bright Sky Blue #02CCFE ΔE 0.072
- Chefchaouen Blue #4895EF ΔE 0.078
- Cornflower Blue #6495ED ΔE 0.081
- Carolina Blue #8AB8FE ΔE 0.085
- Greyblue #77A1B5 ΔE 0.089
Use #2BB1EB 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.