#0183C7
Closest named color: Water Blue (#0E87CC). oklch(58.5% 0.14 242.5), rgb(1, 131, 199).
Aa
Black text reads best on this color (5.07:1).
About this color
#0183C7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.140 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.013 away. Black text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #0183C7 |
| RGB | rgb(1, 131, 199) |
| HSL | hsl(201, 99%, 39%) |
| OKLCH | oklch(58.5% 0.14 242.5) |
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 #0183C7 | 4.13:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #0183C7 | 5.07:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #0183C7 text on white | 4.13:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #0183C7 text on black | 5.07:1 | AA | Lc -33.8 | 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
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEF
oklch(88.6% 0.035 241.5)
-
Step 300
300
#9EC6E6
oklch(80.9% 0.062 242.7)
-
Step 400
400
#65A8DA
oklch(70.7% 0.1 242.3)
-
Step 500
500
#3291D0
oklch(63.1% 0.129 242.3)
-
Step 600
600 (this color)
#0183C7
oklch(58.5% 0.14 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#0B466A
oklch(37.8% 0.083 242.1)
-
Step 950
950
#0A293E
oklch(27% 0.053 242.3)
#0183C7 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) | #6285CA | 0.063 |
| Deuteranopia (no green cones) | #4876C6 | 0.046 |
| Tritanopia (no blue cones) | #00949C | 0.094 |
| Achromatopsia (no color) | #7D7D7D | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0183C7
#0183C7
oklch(58.5% 0.14 242.5)
- #B26600
#B26600
oklch(58.4% 0.134 62.3)
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 #0183C7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.013
- Windows Blue #3778BF ΔE 0.033
- Nice Blue #107AB0 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.041
- Blue NCS #118AB2 ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.059
- Off Blue #5684AE ΔE 0.060
Use #0183C7 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.