#3398DE
Closest named color: Dark Sky Blue (#448EE4). oklch(65.4% 0.138 243.7), rgb(51, 152, 222).
Aa
Black text reads best on this color (6.68:1).
About this color
#3398DE is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.138 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.031 away. Black text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.68:1 |
| White text | 3.14:1 |
Values
| HEX | #3398DE |
| RGB | rgb(51, 152, 222) |
| HSL | hsl(205, 72%, 54%) |
| OKLCH | oklch(65.4% 0.138 243.7) |
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 #3398DE | 3.14:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #3398DE | 6.68:1 | AA | Lc 46.0 | Large or bold text, headings |
| #3398DE text on white | 3.14:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #3398DE text on black | 6.68:1 | AA | Lc -43.7 | 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
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDF1
oklch(88.6% 0.038 243.3)
-
Step 300
300
#9BC6EA
oklch(80.8% 0.069 244)
-
Step 400
400
#61A8DF
oklch(70.7% 0.108 243.5)
-
Step 500
500 (this color)
#3398DE
oklch(65.4% 0.138 243.7)
-
Step 600
600
#0079BC
oklch(55.5% 0.136 243.9)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#03456D
oklch(37.6% 0.09 243.7)
-
Step 950
950
#082940
oklch(27% 0.057 243.6)
#3398DE 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) | #779AE1 | 0.061 |
| Deuteranopia (no green cones) | #608ADD | 0.048 |
| Tritanopia (no blue cones) | #00A9B1 | 0.096 |
| Achromatopsia (no color) | #919191 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3398DE
#3398DE
oklch(65.4% 0.138 243.7)
- #CA7B1F
#CA7B1F
oklch(65.4% 0.138 63.5)
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 #3398DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.032
- Cornflower Blue #6495ED ΔE 0.048
- Water Blue #0E87CC ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.058
- Soft Blue #6488EA ΔE 0.061
- Faded Blue #658CBB ΔE 0.063
- Cool Blue #4984B8 ΔE 0.070
Use #3398DE 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.