#3683EB
Closest named color: Dark Sky Blue (#448EE4). oklch(61.6% 0.174 257.1), rgb(54, 131, 235).
Aa
Black text reads best on this color (5.60:1).
About this color
#3683EB is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.174 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.036 away. Black text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.60:1 |
| White text | 3.74:1 |
Values
| HEX | #3683EB |
| RGB | rgb(54, 131, 235) |
| HSL | hsl(214, 82%, 57%) |
| OKLCH | oklch(61.6% 0.174 257.1) |
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 #3683EB | 3.74:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #3683EB | 5.60:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #3683EB text on white | 3.74:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #3683EB text on black | 5.60:1 | AA | Lc -37.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9EC3F8
oklch(80.9% 0.085 257.3)
-
Step 400
400
#67A2F4
oklch(70.7% 0.136 256.9)
-
Step 500
500 (this color)
#3683EB
oklch(61.6% 0.174 257.1)
-
Step 600
600
#116FDF
oklch(55.7% 0.189 257)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#084B9C
oklch(42.6% 0.146 257.2)
-
Step 900
900
#12407C
oklch(37.7% 0.113 256.9)
-
Step 950
950
#0D2649
oklch(27.1% 0.072 257.4)
#3683EB 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) | #4D8DEF | 0.035 |
| Deuteranopia (no green cones) | #267CE9 | 0.023 |
| Tritanopia (no blue cones) | #009CAB | 0.135 |
| Achromatopsia (no color) | #848484 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3683EB
#3683EB
oklch(61.6% 0.174 257.1)
- #B07900
#B07900
oklch(61.7% 0.129 77)
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 #3683EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.036
- Clear Blue #247AFD ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.041
- Soft Blue #6488EA ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.052
- Water Blue #0E87CC ΔE 0.054
- Cornflower #6A79F7 ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.062
Use #3683EB 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.