#3288D7
Closest named color: Water Blue (#0E87CC). oklch(61.4% 0.145 250), rgb(50, 136, 215).
Aa
Black text reads best on this color (5.63:1).
About this color
#3288D7 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.145 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.024 away. Black text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.63:1 |
| White text | 3.72:1 |
Values
| HEX | #3288D7 |
| RGB | rgb(50, 136, 215) |
| HSL | hsl(209, 67%, 52%) |
| OKLCH | oklch(61.4% 0.145 250) |
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 #3288D7 | 3.72:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #3288D7 | 5.63:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #3288D7 text on white | 3.72:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #3288D7 text on black | 5.63:1 | AA | Lc -37.3 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5ED
oklch(80.9% 0.071 249.4)
-
Step 400
400
#67A5E4
oklch(70.6% 0.113 250.1)
-
Step 500
500 (this color)
#3288D7
oklch(61.4% 0.145 250)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900
#104371
oklch(37.6% 0.094 250.3)
-
Step 950
950
#0C2842
oklch(27.1% 0.059 249.5)
#3288D7 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) | #638DDA | 0.047 |
| Deuteranopia (no green cones) | #4A7DD5 | 0.032 |
| Tritanopia (no blue cones) | #009BA5 | 0.107 |
| Achromatopsia (no color) | #848484 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3288D7
#3288D7
oklch(61.4% 0.145 250)
- #B67400
#B67400
oklch(61.5% 0.133 70.4)
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 #3288D7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.052
- Windows Blue #3778BF ΔE 0.052
- Steel Blue #4682B4 ΔE 0.053
- Soft Blue #6488EA ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.060
Use #3288D7 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.