#3A71D9
Closest named color: Royal Blue (#4169E1). oklch(56.7% 0.17 261.7), rgb(58, 113, 217).
Aa
White text reads best on this color (4.62:1).
About this color
#3A71D9 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.170 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.025 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.54:1 |
| White text | 4.62:1 |
Values
| HEX | #3A71D9 |
| RGB | rgb(58, 113, 217) |
| HSL | hsl(219, 68%, 54%) |
| OKLCH | oklch(56.7% 0.17 261.7) |
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 #3A71D9 | 4.62:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #3A71D9 | 4.54:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #3A71D9 text on white | 4.62:1 | AA | Lc 71.7 | Content text, not long reading |
| #3A71D9 text on black | 4.54:1 | AA | Lc -30.0 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A6C1F3
oklch(80.8% 0.077 262.6)
-
Step 400
400
#76A0ED
oklch(70.7% 0.122 261.9)
-
Step 500
500
#5286E7
oklch(63.1% 0.157 261.7)
-
Step 600
600 (this color)
#3A71D9
oklch(56.7% 0.17 261.7)
-
Step 700
700
#295BB9
oklch(49.2% 0.158 261.5)
-
Step 800
800
#234B95
oklch(42.7% 0.13 261.4)
-
Step 900
900
#213F77
oklch(37.7% 0.102 261.6)
-
Step 950
950
#142546
oklch(26.9% 0.066 262.3)
#3A71D9 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) | #377DDD | 0.031 |
| Deuteranopia (no green cones) | #006ED7 | 0.030 |
| Tritanopia (no blue cones) | #008A9A | 0.136 |
| Achromatopsia (no color) | #757575 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A71D9
#3A71D9
oklch(56.7% 0.17 261.7)
- #996E00
#996E00
oklch(56.7% 0.117 81.4)
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 #3A71D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.025
- Cerulean Blue #056EEE ΔE 0.042
- Windows Blue #3778BF ΔE 0.047
- Neon Blue #4361EE ΔE 0.052
- Clear Blue #247AFD ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.062
- Warm Blue #4B57DB ΔE 0.063
- Mid Blue #276AB3 ΔE 0.064
Use #3A71D9 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.