#3377D6
Closest named color: Windows Blue (#3778BF). oklch(57.6% 0.161 257.6), rgb(51, 119, 214).
Aa
Black text reads best on this color (4.75:1).
About this color
#3377D6 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.161 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.036 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.75:1 |
| White text | 4.42:1 |
Values
| HEX | #3377D6 |
| RGB | rgb(51, 119, 214) |
| HSL | hsl(215, 67%, 52%) |
| OKLCH | oklch(57.6% 0.161 257.6) |
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 #3377D6 | 4.42:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #3377D6 | 4.75:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #3377D6 text on white | 4.42:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #3377D6 text on black | 4.75:1 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A4C3F0
oklch(81% 0.072 257.6)
-
Step 400
400
#71A2E8
oklch(70.6% 0.116 257.3)
-
Step 500
500
#4B89E1
oklch(63.1% 0.148 257.4)
-
Step 600
600 (this color)
#3377D6
oklch(57.6% 0.161 257.6)
-
Step 700
700
#1F5EB4
oklch(49.1% 0.151 257.6)
-
Step 800
800
#1C4D91
oklch(42.6% 0.124 257.6)
-
Step 900
900
#1D4174
oklch(37.7% 0.097 257.5)
-
Step 950
950
#122644
oklch(26.9% 0.062 258.3)
#3377D6 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) | #4680DA | 0.031 |
| Deuteranopia (no green cones) | #2471D4 | 0.020 |
| Tritanopia (no blue cones) | #008D9C | 0.124 |
| Achromatopsia (no color) | #787878 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3377D6
#3377D6
oklch(57.6% 0.161 257.6)
- #A06E00
#A06E00
oklch(57.6% 0.12 77.3)
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 #3377D6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.036
- Royal Blue #4169E1 ΔE 0.041
- Water Blue #0E87CC ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.050
- Clear Blue #247AFD ΔE 0.059
- Mid Blue #276AB3 ΔE 0.063
- Nice Blue #107AB0 ΔE 0.065
- French Blue #436BAD ΔE 0.066
Use #3377D6 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.