#2780C2
Closest named color: Water Blue (#0E87CC). oklch(58% 0.13 245.7), rgb(39, 128, 194).
Aa
Black text reads best on this color (4.95:1).
About this color
#2780C2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.130 and its hue 246°. 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 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.95:1 |
| White text | 4.23:1 |
Values
| HEX | #2780C2 |
| RGB | rgb(39, 128, 194) |
| HSL | hsl(206, 67%, 46%) |
| OKLCH | oklch(58% 0.13 245.7) |
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 #2780C2 | 4.23:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #2780C2 | 4.95:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #2780C2 text on white | 4.23:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #2780C2 text on black | 4.95:1 | AA | Lc -32.8 | 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 600.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A2C5E5
oklch(80.9% 0.059 246.2)
-
Step 400
400
#6EA7D8
oklch(70.8% 0.094 245.6)
-
Step 500
500
#4390CD
oklch(63.2% 0.119 245.3)
-
Step 600
600 (this color)
#2780C2
oklch(58% 0.13 245.7)
-
Step 700
700
#0B65A0
oklch(49% 0.121 245.6)
-
Step 800
800
#105382
oklch(42.8% 0.1 245.4)
-
Step 900
900
#174568
oklch(37.7% 0.078 245.2)
-
Step 950
950
#0F283D
oklch(26.8% 0.05 246.5)
#2780C2 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) | #6183C5 | 0.053 |
| Deuteranopia (no green cones) | #4B75C1 | 0.037 |
| Tritanopia (no blue cones) | #009098 | 0.092 |
| Achromatopsia (no color) | #7B7B7B | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2780C2
#2780C2
oklch(58% 0.13 245.7)
- #AD6800
#AD6800
oklch(58.1% 0.129 65.9)
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 #2780C2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Windows Blue #3778BF ΔE 0.022
- Steel Blue #4682B4 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.033
- Nice Blue #107AB0 ΔE 0.034
- Blue NCS #118AB2 ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.048
- Off Blue #5684AE ΔE 0.051
Use #2780C2 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.