#338DD5
Closest named color: Dark Sky Blue (#448EE4). oklch(62.4% 0.137 246.8), rgb(51, 141, 213).
Aa
Black text reads best on this color (5.91:1).
About this color
#338DD5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.137 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.027 away. Black text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.91:1 |
| White text | 3.55:1 |
Values
| HEX | #338DD5 |
| RGB | rgb(51, 141, 213) |
| HSL | hsl(207, 66%, 52%) |
| OKLCH | oklch(62.4% 0.137 246.8) |
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 #338DD5 | 3.55:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #338DD5 | 5.91:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #338DD5 text on white | 3.55:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #338DD5 text on black | 5.91:1 | AA | Lc -39.0 | 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
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9EC5EA
oklch(80.8% 0.067 247.3)
-
Step 400
400
#66A7E0
oklch(70.8% 0.107 246.5)
-
Step 500
500 (this color)
#338DD5
oklch(62.4% 0.137 246.8)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0065A5
oklch(49.2% 0.128 246.7)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#0D446E
oklch(37.6% 0.09 247.1)
-
Step 950
950
#0B2840
oklch(26.9% 0.056 247)
#338DD5 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) | #6C90D8 | 0.054 |
| Deuteranopia (no green cones) | #5481D4 | 0.038 |
| Tritanopia (no blue cones) | #009EA7 | 0.098 |
| Achromatopsia (no color) | #888888 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #338DD5
#338DD5
oklch(62.4% 0.137 246.8)
- #BD7403
#BD7403
oklch(62.4% 0.137 67)
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 #338DD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.027
- Water Blue #0E87CC ΔE 0.028
- Cool Blue #4984B8 ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.047
- Steel Blue #4682B4 ΔE 0.053
- Faded Blue #658CBB ΔE 0.056
- Soft Blue #6488EA ΔE 0.057
- Blue NCS #118AB2 ΔE 0.058
Use #338DD5 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.