#2E78A8
Closest named color: Flat Blue (#3C73A8). oklch(54.9% 0.104 241), rgb(46, 120, 168).
Aa
White text reads best on this color (4.80:1).
About this color
#2E78A8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.104 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.017 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #2E78A8 |
| RGB | rgb(46, 120, 168) |
| HSL | hsl(204, 57%, 42%) |
| OKLCH | oklch(54.9% 0.104 241) |
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 #2E78A8 | 4.80:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #2E78A8 | 4.36:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #2E78A8 text on white | 4.80:1 | AA | Lc 73.1 | Content text, not long reading |
| #2E78A8 text on black | 4.36:1 | AA large text | Lc -28.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE9
oklch(88.6% 0.026 240.7)
-
Step 300
300
#A6C5DD
oklch(80.9% 0.048 241.5)
-
Step 400
400
#76A7CB
oklch(70.7% 0.074 241)
-
Step 500
500
#5091BE
oklch(63.2% 0.095 240.7)
-
Step 600
600 (this color)
#2E78A8
oklch(54.9% 0.104 241)
-
Step 700
700
#226792
oklch(49.2% 0.096 240.6)
-
Step 800
800
#1F5477
oklch(42.8% 0.08 241.3)
-
Step 900
900
#1F4560
oklch(37.6% 0.063 242.1)
-
Step 950
950
#132938
oklch(27% 0.04 240.2)
#2E78A8 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) | #6279AA | 0.053 |
| Deuteranopia (no green cones) | #516DA7 | 0.042 |
| Tritanopia (no blue cones) | #008489 | 0.071 |
| Achromatopsia (no color) | #727272 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E78A8
#2E78A8
oklch(54.9% 0.104 241)
- #9C6129
#9C6129
oklch(54.7% 0.104 60.9)
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 #2E78A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.017
- Nice Blue #107AB0 ΔE 0.017
- Muted Blue #3B719F ΔE 0.022
- Dull Blue #49759C ΔE 0.027
- Cerulean #457B9D ΔE 0.028
- Ocean Blue #03719C ΔE 0.035
- Stormy Blue #507B9C ΔE 0.038
- Windows Blue #3778BF ΔE 0.038
Use #2E78A8 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.