#1283CE
Closest named color: Water Blue (#0E87CC). oklch(59.1% 0.146 245.8), rgb(18, 131, 206).
Aa
Black text reads best on this color (5.16:1).
About this color
#1283CE is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.146 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.012 away. Black text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #1283CE |
| RGB | rgb(18, 131, 206) |
| HSL | hsl(204, 84%, 44%) |
| OKLCH | oklch(59.1% 0.146 245.8) |
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 #1283CE | 4.06:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #1283CE | 5.16:1 | AA | Lc 36.8 | Non-text elements, placeholder text |
| #1283CE text on white | 4.06:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #1283CE text on black | 5.16:1 | AA | Lc -34.4 | 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
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9EC6E9
oklch(81% 0.065 245.1)
-
Step 400
400
#66A7DE
oklch(70.7% 0.105 245.6)
-
Step 500
500
#3690D5
oklch(63.2% 0.134 245.6)
-
Step 600
600 (this color)
#1283CE
oklch(59.1% 0.146 245.8)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005387
oklch(42.8% 0.11 245.8)
-
Step 900
900
#0D456D
oklch(37.8% 0.088 245.6)
-
Step 950
950
#0B2940
oklch(27.2% 0.055 245.2)
#1283CE 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) | #5F87D1 | 0.058 |
| Deuteranopia (no green cones) | #4377CD | 0.039 |
| Tritanopia (no blue cones) | #00959F | 0.101 |
| Achromatopsia (no color) | #7E7E7E | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1283CE
#1283CE
oklch(59.1% 0.146 245.8)
- #B16B00
#B16B00
oklch(59.1% 0.131 66.3)
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 #1283CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.012
- Windows Blue #3778BF ΔE 0.035
- Cool Blue #4984B8 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.047
- Nice Blue #107AB0 ΔE 0.049
- Blue NCS #118AB2 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.054
- Off Blue #5684AE ΔE 0.065
Use #1283CE 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.