#2C78B7
Closest named color: Windows Blue (#3778BF). oklch(55.7% 0.123 247.5), rgb(44, 120, 183).
Aa
White text reads best on this color (4.69:1).
About this color
#2C78B7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.123 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.016 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #2C78B7 |
| RGB | rgb(44, 120, 183) |
| HSL | hsl(207, 61%, 45%) |
| OKLCH | oklch(55.7% 0.123 247.5) |
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 #2C78B7 | 4.69:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #2C78B7 | 4.47:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #2C78B7 text on white | 4.69:1 | AA | Lc 72.2 | Content text, not long reading |
| #2C78B7 text on black | 4.47:1 | AA large text | Lc -29.5 | Dividers and decoration only |
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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCED
oklch(88.6% 0.03 246.6)
-
Step 300
300
#A5C5E3
oklch(81% 0.055 246.8)
-
Step 400
400
#73A6D5
oklch(70.7% 0.088 247.2)
-
Step 500
500
#4C8FCA
oklch(63.2% 0.113 247.2)
-
Step 600
600 (this color)
#2C78B7
oklch(55.7% 0.123 247.5)
-
Step 700
700
#1E649D
oklch(49% 0.114 247.7)
-
Step 800
800
#1B5280
oklch(42.7% 0.095 247.8)
-
Step 900
900
#1D4466
oklch(37.6% 0.073 247.5)
-
Step 950
950
#12283C
oklch(26.9% 0.047 247.8)
#2C78B7 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) | #5B7BBA | 0.046 |
| Deuteranopia (no green cones) | #476EB6 | 0.033 |
| Tritanopia (no blue cones) | #00878F | 0.088 |
| Achromatopsia (no color) | #747474 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C78B7
#2C78B7
oklch(55.7% 0.123 247.5)
- #A26300
#A26300
oklch(55.7% 0.123 67.4)
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 #2C78B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.016
- Nice Blue #107AB0 ΔE 0.019
- Flat Blue #3C73A8 ΔE 0.025
- French Blue #436BAD ΔE 0.038
- Muted Blue #3B719F ΔE 0.039
- Steel Blue #4682B4 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.045
Use #2C78B7 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.