#3491DA
Closest named color: Dark Sky Blue (#448EE4). oklch(63.6% 0.139 246.4), rgb(52, 145, 218).
Aa
Black text reads best on this color (6.20:1).
About this color
#3491DA is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.139 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.022 away. Black text reads best on it, at 6.20:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.20:1 |
| White text | 3.38:1 |
Values
| HEX | #3491DA |
| RGB | rgb(52, 145, 218) |
| HSL | hsl(206, 69%, 53%) |
| OKLCH | oklch(63.6% 0.139 246.4) |
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 #3491DA | 3.38:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #3491DA | 6.20:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #3491DA text on white | 3.38:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #3491DA text on black | 6.20:1 | AA | Lc -40.8 | 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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF7
oklch(93.7% 0.02 245.6)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9DC6EB
oklch(81% 0.068 246)
-
Step 400
400
#64A7E1
oklch(70.7% 0.109 246.3)
-
Step 500
500 (this color)
#3491DA
oklch(63.6% 0.139 246.4)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#0A456F
oklch(37.8% 0.091 246.2)
-
Step 950
950
#0A2841
oklch(26.9% 0.058 247.4)
#3491DA 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) | #6F94DD | 0.055 |
| Deuteranopia (no green cones) | #5885D9 | 0.040 |
| Tritanopia (no blue cones) | #00A3AB | 0.101 |
| Achromatopsia (no color) | #8C8C8C | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3491DA
#3491DA
oklch(63.6% 0.139 246.4)
- #C37708
#C37708
oklch(63.7% 0.14 66.1)
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 #3491DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.022
- Chefchaouen Blue #4895EF ΔE 0.037
- Water Blue #0E87CC ΔE 0.039
- Cornflower Blue #6495ED ΔE 0.053
- Soft Blue #6488EA ΔE 0.054
- Cool Blue #4984B8 ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.056
- Faded Blue #658CBB ΔE 0.058
Use #3491DA 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.