#2B8BD3
Closest named color: Water Blue (#0E87CC). oklch(61.7% 0.139 246), rgb(43, 139, 211).
Aa
Black text reads best on this color (5.73:1).
About this color
#2B8BD3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.139 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.73:1 |
| White text | 3.66:1 |
Values
| HEX | #2B8BD3 |
| RGB | rgb(43, 139, 211) |
| HSL | hsl(206, 66%, 50%) |
| OKLCH | oklch(61.7% 0.139 246) |
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 #2B8BD3 | 3.66:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #2B8BD3 | 5.73:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #2B8BD3 text on white | 3.66:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #2B8BD3 text on black | 5.73:1 | AA | Lc -37.9 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF7
oklch(93.7% 0.02 245.6)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9DC6EB
oklch(81% 0.068 246)
-
Step 400
400
#64A7E0
oklch(70.7% 0.108 245.8)
-
Step 500
500 (this color)
#2B8BD3
oklch(61.7% 0.139 246)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005387
oklch(42.8% 0.11 245.8)
-
Step 900
900
#09456E
oklch(37.8% 0.09 245.4)
-
Step 950
950
#0A2841
oklch(26.9% 0.058 247.4)
#2B8BD3 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) | #698ED6 | 0.055 |
| Deuteranopia (no green cones) | #517FD2 | 0.039 |
| Tritanopia (no blue cones) | #009CA5 | 0.098 |
| Achromatopsia (no color) | #868686 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B8BD3
#2B8BD3
oklch(61.7% 0.139 246)
- #BC7100
#BC7100
oklch(61.7% 0.138 65.6)
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 #2B8BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Dark Sky Blue #448EE4 ΔE 0.033
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.049
- Blue NCS #118AB2 ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.054
- Windows Blue #3778BF ΔE 0.055
- Faded Blue #658CBB ΔE 0.059
Use #2B8BD3 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.