#2780E1
Closest named color: Water Blue (#0E87CC). oklch(59.9% 0.168 254.1), rgb(39, 128, 225).
Aa
Black text reads best on this color (5.26:1).
About this color
#2780E1 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.168 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.041 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.26:1 |
| White text | 3.99:1 |
Values
| HEX | #2780E1 |
| RGB | rgb(39, 128, 225) |
| HSL | hsl(211, 76%, 52%) |
| OKLCH | oklch(59.9% 0.168 254.1) |
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 #2780E1 | 3.99:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #2780E1 | 5.26:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #2780E1 text on white | 3.99:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #2780E1 text on black | 5.26:1 | AA | Lc -34.9 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9CC4F5
oklch(80.9% 0.082 253.8)
-
Step 400
400
#63A3F1
oklch(70.6% 0.133 254.3)
-
Step 500
500 (this color)
#2780E1
oklch(59.9% 0.168 254.1)
-
Step 600
600
#0072D7
oklch(55.6% 0.177 254)
-
Step 700
700
#005FB6
oklch(49% 0.157 254.2)
-
Step 800
800
#004E97
oklch(42.8% 0.136 254.1)
-
Step 900
900
#0C417A
oklch(37.6% 0.111 254.4)
-
Step 950
950
#0A2747
oklch(27.1% 0.069 253.6)
#2780E1 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) | #4E88E5 | 0.039 |
| Deuteranopia (no green cones) | #2878DF | 0.021 |
| Tritanopia (no blue cones) | #0097A5 | 0.126 |
| Achromatopsia (no color) | #7F7F7F | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2780E1
#2780E1
oklch(59.9% 0.168 254.1)
- #AC7200
#AC7200
oklch(59.8% 0.127 73.9)
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 #2780E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.046
- Clear Blue #247AFD ΔE 0.047
- Windows Blue #3778BF ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.057
- Royal Blue #4169E1 ΔE 0.058
- Soft Blue #6488EA ΔE 0.061
Use #2780E1 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.