#3491DE
Closest named color: Dark Sky Blue (#448EE4). oklch(63.9% 0.144 247.7), rgb(52, 145, 222).
Aa
Black text reads best on this color (6.25:1).
About this color
#3491DE is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.144 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.017 away. Black text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.25:1 |
| White text | 3.35:1 |
Values
| HEX | #3491DE |
| RGB | rgb(52, 145, 222) |
| HSL | hsl(207, 72%, 54%) |
| OKLCH | oklch(63.9% 0.144 247.7) |
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 #3491DE | 3.35:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #3491DE | 6.25:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #3491DE text on white | 3.35:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #3491DE text on black | 6.25:1 | AA | Lc -41.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9DC5EC
oklch(80.8% 0.07 248.1)
-
Step 400
400
#64A6E3
oklch(70.6% 0.113 247.9)
-
Step 500
500 (this color)
#3491DE
oklch(63.9% 0.144 247.7)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#0A4470
oklch(37.6% 0.094 247.6)
-
Step 950
950
#0A2842
oklch(27% 0.06 248.4)
#3491DE 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) | #6D95E1 | 0.053 |
| Deuteranopia (no green cones) | #5585DD | 0.038 |
| Tritanopia (no blue cones) | #00A3AD | 0.103 |
| Achromatopsia (no color) | #8C8C8C | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3491DE
#3491DE
oklch(63.9% 0.144 247.7)
- #C37800
#C37800
oklch(63.8% 0.141 67.3)
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 #3491DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.017
- Chefchaouen Blue #4895EF ΔE 0.032
- Water Blue #0E87CC ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.049
- Dodger Blue #1E90FF ΔE 0.050
- Soft Blue #6488EA ΔE 0.051
- Cool Blue #4984B8 ΔE 0.061
- Faded Blue #658CBB ΔE 0.062
Use #3491DE 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.