#338FD5
Closest named color: Dark Sky Blue (#448EE4). oklch(62.9% 0.136 245.7), rgb(51, 143, 213).
Aa
Black text reads best on this color (6.03:1).
About this color
#338FD5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.136 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.027 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.03:1 |
| White text | 3.48:1 |
Values
| HEX | #338FD5 |
| RGB | rgb(51, 143, 213) |
| HSL | hsl(206, 66%, 52%) |
| OKLCH | oklch(62.9% 0.136 245.7) |
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 #338FD5 | 3.48:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #338FD5 | 6.03:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #338FD5 text on white | 3.48:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #338FD5 text on black | 6.03:1 | AA | Lc -39.7 | 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
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9EC6E9
oklch(81% 0.065 245.1)
-
Step 400
400
#65A7DF
oklch(70.7% 0.107 245.7)
-
Step 500
500 (this color)
#338FD5
oklch(62.9% 0.136 245.7)
-
Step 600
600
#0078C0
oklch(55.5% 0.142 245.8)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#0C456D
oklch(37.7% 0.088 245.4)
-
Step 950
950
#0A2940
oklch(27.1% 0.056 244.7)
#338FD5 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) | #6F92D8 | 0.056 |
| Deuteranopia (no green cones) | #5883D4 | 0.040 |
| Tritanopia (no blue cones) | #00A0A8 | 0.097 |
| Achromatopsia (no color) | #898989 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #338FD5
#338FD5
oklch(62.9% 0.136 245.7)
- #BF7512
#BF7512
oklch(62.8% 0.135 65.6)
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 #338FD5, 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 0.032
- Chefchaouen Blue #4895EF ΔE 0.045
- Cool Blue #4984B8 ΔE 0.048
- Faded Blue #658CBB ΔE 0.054
- Steel Blue #4682B4 ΔE 0.055
- Blue NCS #118AB2 ΔE 0.058
- Soft Blue #6488EA ΔE 0.058
Use #338FD5 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.