#0183B8
Closest named color: Blue NCS (#118AB2). oklch(57.7% 0.124 235.9), rgb(1, 131, 184).
Aa
Black text reads best on this color (4.93:1).
About this color
#0183B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.124 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.025 away. Black text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #0183B8 |
| RGB | rgb(1, 131, 184) |
| HSL | hsl(197, 99%, 36%) |
| OKLCH | oklch(57.7% 0.124 235.9) |
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 #0183B8 | 4.25:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #0183B8 | 4.93:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #0183B8 text on white | 4.25:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #0183B8 text on black | 4.93:1 | AA | Lc -32.9 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#9FC7E0
oklch(80.9% 0.055 235.8)
-
Step 400
400
#67A9D1
oklch(70.6% 0.089 236.5)
-
Step 500
500
#3593C5
oklch(63% 0.114 236.2)
-
Step 600
600 (this color)
#0183B8
oklch(57.7% 0.124 235.9)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#0D4763
oklch(37.7% 0.074 235.5)
-
Step 950
950
#0B2A3A
oklch(27.1% 0.047 234.9)
#0183B8 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) | #6983BA | 0.072 |
| Deuteranopia (no green cones) | #5374B7 | 0.058 |
| Tritanopia (no blue cones) | #009195 | 0.078 |
| Achromatopsia (no color) | #7B7B7B | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0183B8
#0183B8
oklch(57.7% 0.124 235.9)
- #AF6324
#AF6324
oklch(57.6% 0.123 55.9)
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 #0183B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.026
- Water Blue #0E87CC ΔE 0.032
- Steel Blue #4682B4 ΔE 0.033
- Cool Blue #4984B8 ΔE 0.037
- Windows Blue #3778BF ΔE 0.039
- Teal Blue #01889F ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.049
Use #0183B8 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.