#3177E2
Closest named color: Royal Blue (#4169E1). oklch(58.3% 0.177 259), rgb(49, 119, 226).
Aa
Black text reads best on this color (4.86:1).
About this color
#3177E2 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.177 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.035 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #3177E2 |
| RGB | rgb(49, 119, 226) |
| HSL | hsl(216, 75%, 54%) |
| OKLCH | oklch(58.3% 0.177 259) |
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 #3177E2 | 4.31:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #3177E2 | 4.86:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #3177E2 text on white | 4.31:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #3177E2 text on black | 4.86:1 | AA | Lc -32.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#6FA1F0
oklch(70.7% 0.128 259.2)
-
Step 500
500
#4787EA
oklch(63% 0.163 258.9)
-
Step 600
600 (this color)
#3177E2
oklch(58.3% 0.177 259)
-
Step 700
700
#1B5CBC
oklch(49.2% 0.165 258.9)
-
Step 800
800
#194B98
oklch(42.6% 0.137 259.2)
-
Step 900
900
#1B4079
oklch(37.8% 0.106 258.9)
-
Step 950
950
#112647
oklch(27.1% 0.067 259.1)
#3177E2 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) | #3B82E6 | 0.031 |
| Deuteranopia (no green cones) | #0072E0 | 0.026 |
| Tritanopia (no blue cones) | #0091A1 | 0.138 |
| Achromatopsia (no color) | #7A7A7A | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3177E2
#3177E2
oklch(58.3% 0.177 259)
- #A17100
#A17100
oklch(58.3% 0.121 79.1)
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 #3177E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Cerulean Blue #056EEE ΔE 0.037
- Clear Blue #247AFD ΔE 0.041
- Windows Blue #3778BF ΔE 0.055
- Neon Blue #4361EE ΔE 0.057
- Water Blue #0E87CC ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.065
- Bright Blue #0165FC ΔE 0.066
Use #3177E2 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.