#1383CB
Closest named color: Water Blue (#0E87CC). oklch(58.9% 0.142 244.9), rgb(19, 131, 203).
Aa
Black text reads best on this color (5.13:1).
About this color
#1383CB is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.142 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.011 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.13:1 |
| White text | 4.08:1 |
Values
| HEX | #1383CB |
| RGB | rgb(19, 131, 203) |
| HSL | hsl(203, 83%, 44%) |
| OKLCH | oklch(58.9% 0.142 244.9) |
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 #1383CB | 4.08:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #1383CB | 5.13:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #1383CB text on white | 4.08:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #1383CB text on black | 5.13:1 | AA | Lc -34.2 | 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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9EC6E8
oklch(80.9% 0.064 244.3)
-
Step 400
400
#67A7DC
oklch(70.7% 0.102 244.9)
-
Step 500
500
#3790D3
oklch(63.1% 0.131 245)
-
Step 600
600 (this color)
#1383CB
oklch(58.9% 0.142 244.9)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#0E456B
oklch(37.7% 0.085 244.5)
-
Step 950
950
#0B293F
oklch(27.1% 0.054 244.1)
#1383CB 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) | #6086CE | 0.058 |
| Deuteranopia (no green cones) | #4676CA | 0.042 |
| Tritanopia (no blue cones) | #00959D | 0.100 |
| Achromatopsia (no color) | #7D7D7D | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1383CB
#1383CB
oklch(58.9% 0.142 244.9)
- #B16900
#B16900
oklch(58.8% 0.132 64.9)
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 #1383CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.011
- Windows Blue #3778BF ΔE 0.033
- Cool Blue #4984B8 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.057
- Off Blue #5684AE ΔE 0.061
Use #1383CB 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.