#3390CD
Closest named color: Water Blue (#0E87CC). oklch(62.7% 0.126 241.9), rgb(51, 144, 205).
Aa
Black text reads best on this color (6.01:1).
About this color
#3390CD is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.126 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.032 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #3390CD |
| RGB | rgb(51, 144, 205) |
| HSL | hsl(204, 61%, 50%) |
| OKLCH | oklch(62.7% 0.126 241.9) |
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 #3390CD | 3.49:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #3390CD | 6.01:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #3390CD text on white | 3.49:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #3390CD text on black | 6.01:1 | AA | Lc -39.6 | 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
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEE
oklch(88.6% 0.034 239.9)
-
Step 300
300
#9EC6E5
oklch(80.8% 0.061 241.8)
-
Step 400
400
#66A8D9
oklch(70.7% 0.099 242.1)
-
Step 500
500 (this color)
#3390CD
oklch(62.7% 0.126 241.9)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#0C4669
oklch(37.8% 0.082 241.6)
-
Step 950
950
#0B293D
oklch(27% 0.051 241.6)
#3390CD 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) | #7491D0 | 0.061 |
| Deuteranopia (no green cones) | #5E83CC | 0.047 |
| Tritanopia (no blue cones) | #009FA5 | 0.087 |
| Achromatopsia (no color) | #898989 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3390CD
#3390CD
oklch(62.7% 0.126 241.9)
- #BD752A
#BD752A
oklch(62.7% 0.125 62.4)
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 #3390CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.041
- Blue NCS #118AB2 ΔE 0.047
- Faded Blue #658CBB ΔE 0.047
- Steel Blue #4682B4 ΔE 0.048
- Off Blue #5684AE ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.054
Use #3390CD 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.