#3170DA
Closest named color: Royal Blue (#4169E1). oklch(56.3% 0.175 260.2), rgb(49, 112, 218).
Aa
White text reads best on this color (4.70:1).
About this color
#3170DA is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.175 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.024 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #3170DA |
| RGB | rgb(49, 112, 218) |
| HSL | hsl(218, 70%, 52%) |
| OKLCH | oklch(56.3% 0.175 260.2) |
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 #3170DA | 4.70:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #3170DA | 4.46:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #3170DA text on white | 4.70:1 | AA | Lc 72.2 | Content text, not long reading |
| #3170DA text on black | 4.46:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A3C2F4
oklch(80.9% 0.079 259.9)
-
Step 400
400
#72A1EF
oklch(70.8% 0.126 260.1)
-
Step 500
500
#4C87E9
oklch(63.2% 0.16 260)
-
Step 600
600 (this color)
#3170DA
oklch(56.3% 0.175 260.2)
-
Step 700
700
#225BBB
oklch(49.1% 0.163 260.3)
-
Step 800
800
#1E4B97
oklch(42.7% 0.134 260.3)
-
Step 900
900
#1E3F78
oklch(37.6% 0.105 260.5)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#3170DA 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) | #327CDE | 0.032 |
| Deuteranopia (no green cones) | #006CD8 | 0.025 |
| Tritanopia (no blue cones) | #00899A | 0.136 |
| Achromatopsia (no color) | #737373 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3170DA
#3170DA
oklch(56.3% 0.175 260.2)
- #996C00
#996C00
oklch(56.3% 0.117 79.8)
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 #3170DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.024
- Cerulean Blue #056EEE ΔE 0.036
- Neon Blue #4361EE ΔE 0.050
- Windows Blue #3778BF ΔE 0.050
- Clear Blue #247AFD ΔE 0.056
- Azul #1D5DEC ΔE 0.058
- Warm Blue #4B57DB ΔE 0.061
- Mid Blue #276AB3 ΔE 0.062
Use #3170DA 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.