#2B77D8
Closest named color: Windows Blue (#3778BF). oklch(57.5% 0.166 256.4), rgb(43, 119, 216).
Aa
Black text reads best on this color (4.73:1).
About this color
#2B77D8 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.166 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.040 away. Black text reads best on it, at 4.73:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #2B77D8 |
| RGB | rgb(43, 119, 216) |
| HSL | hsl(214, 69%, 51%) |
| OKLCH | oklch(57.5% 0.166 256.4) |
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 #2B77D8 | 4.43:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #2B77D8 | 4.73:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #2B77D8 text on white | 4.43:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #2B77D8 text on black | 4.73:1 | AA | Lc -31.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A2C3F1
oklch(80.9% 0.075 256.7)
-
Step 400
400
#6EA3EA
oklch(70.8% 0.119 256.1)
-
Step 500
500
#4689E4
oklch(63% 0.154 256.8)
-
Step 600
600 (this color)
#2B77D8
oklch(57.5% 0.166 256.4)
-
Step 700
700
#165EB6
oklch(49.1% 0.155 256.5)
-
Step 800
800
#164D93
oklch(42.6% 0.128 256.6)
-
Step 900
900
#194175
oklch(37.7% 0.1 256.3)
-
Step 950
950
#102645
oklch(26.9% 0.064 257.3)
#2B77D8 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) | #4480DC | 0.034 |
| Deuteranopia (no green cones) | #1B70D6 | 0.022 |
| Tritanopia (no blue cones) | #008E9D | 0.126 |
| Achromatopsia (no color) | #787878 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B77D8
#2B77D8
oklch(57.5% 0.166 256.4)
- #A06D00
#A06D00
oklch(57.4% 0.12 76.5)
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 #2B77D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.040
- Royal Blue #4169E1 ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.046
- Water Blue #0E87CC ΔE 0.050
- Clear Blue #247AFD ΔE 0.056
- Mid Blue #276AB3 ΔE 0.064
- Neon Blue #4361EE ΔE 0.066
- Nice Blue #107AB0 ΔE 0.067
Use #2B77D8 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.