#1183D1
Closest named color: Water Blue (#0E87CC). oklch(59.2% 0.15 246.7), rgb(17, 131, 209).
Aa
Black text reads best on this color (5.19:1).
About this color
#1183D1 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.150 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.015 away. Black text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.19:1 |
| White text | 4.04:1 |
Values
| HEX | #1183D1 |
| RGB | rgb(17, 131, 209) |
| HSL | hsl(204, 85%, 44%) |
| OKLCH | oklch(59.2% 0.15 246.7) |
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 #1183D1 | 4.04:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #1183D1 | 5.19:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #1183D1 text on white | 4.04:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #1183D1 text on black | 5.19:1 | AA | Lc -34.6 | 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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
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
#358FD7
oklch(63.1% 0.137 246.7)
-
Step 600
600 (this color)
#1183D1
oklch(59.2% 0.15 246.7)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
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)
#1183D1 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) | #5D87D4 | 0.056 |
| Deuteranopia (no green cones) | #4077D0 | 0.037 |
| Tritanopia (no blue cones) | #0096A0 | 0.105 |
| Achromatopsia (no color) | #7E7E7E | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1183D1
#1183D1
oklch(59.2% 0.15 246.7)
- #B16C00
#B16C00
oklch(59.3% 0.131 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 #1183D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.015
- Windows Blue #3778BF ΔE 0.038
- Cool Blue #4984B8 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Nice Blue #107AB0 ΔE 0.053
- Blue NCS #118AB2 ΔE 0.057
- Off Blue #5684AE ΔE 0.068
Use #1183D1 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.