#2688BF
Closest named color: Water Blue (#0E87CC). oklch(59.7% 0.121 238.9), rgb(38, 136, 191).
Aa
Black text reads best on this color (5.35:1).
About this color
#2688BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.121 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 5.35:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.35:1 |
| White text | 3.92:1 |
Values
| HEX | #2688BF |
| RGB | rgb(38, 136, 191) |
| HSL | hsl(202, 67%, 45%) |
| OKLCH | oklch(59.7% 0.121 238.9) |
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 #2688BF | 3.92:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #2688BF | 5.35:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #2688BF text on white | 3.92:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #2688BF text on black | 5.35:1 | AA | Lc -35.5 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDED
oklch(88.5% 0.033 238.2)
-
Step 300
300
#9EC7E3
oklch(81% 0.059 238.3)
-
Step 400
400
#66A9D5
oklch(70.7% 0.094 238.8)
-
Step 500
500 (this color)
#2688BF
oklch(59.7% 0.121 238.9)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#0B4666
oklch(37.6% 0.079 239)
-
Step 950
950
#0A293C
oklch(26.9% 0.05 239.7)
#2688BF 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) | #6E88C1 | 0.064 |
| Deuteranopia (no green cones) | #597ABE | 0.052 |
| Tritanopia (no blue cones) | #00969B | 0.080 |
| Achromatopsia (no color) | #818181 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2688BF
#2688BF
oklch(59.7% 0.121 238.9)
- #B36B2A
#B36B2A
oklch(59.6% 0.12 58.8)
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 #2688BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Blue NCS #118AB2 ΔE 0.024
- Cool Blue #4984B8 ΔE 0.025
- Steel Blue #4682B4 ΔE 0.027
- Off Blue #5684AE ΔE 0.041
- Windows Blue #3778BF ΔE 0.045
- Nice Blue #107AB0 ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.046
Use #2688BF 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.