#0198EB
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.5% 0.162 244.1), rgb(1, 152, 235).
Aa
Black text reads best on this color (6.69:1).
About this color
#0198EB is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.162 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.030 away. Black text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.69:1 |
| White text | 3.13:1 |
Values
| HEX | #0198EB |
| RGB | rgb(1, 152, 235) |
| HSL | hsl(201, 99%, 46%) |
| OKLCH | oklch(65.5% 0.162 244.1) |
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 #0198EB | 3.13:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #0198EB | 6.69:1 | AA | Lc 46.3 | Large or bold text, headings |
| #0198EB text on white | 3.13:1 | AA large text | Lc 57.7 | Large or bold text, headings |
| #0198EB text on black | 6.69:1 | AA | Lc -44.0 | 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 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C1DDF5
oklch(88.5% 0.045 244.2)
-
Step 300
300
#95C7F0
oklch(80.9% 0.078 243.7)
-
Step 400
400
#53A8E9
oklch(70.6% 0.126 244.1)
-
Step 500
500 (this color)
#0198EB
oklch(65.5% 0.162 244.1)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#0198EB 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) | #6F9BEE | 0.067 |
| Deuteranopia (no green cones) | #5089E9 | 0.048 |
| Tritanopia (no blue cones) | #00ACB6 | 0.110 |
| Achromatopsia (no color) | #919191 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0198EB
#0198EB
oklch(65.5% 0.162 244.1)
- #CE7A00
#CE7A00
oklch(65.6% 0.148 64.2)
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 #0198EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.053
- Water Blue #0E87CC ΔE 0.060
- Soft Blue #6488EA ΔE 0.063
- Faded Blue #658CBB ΔE 0.084
- Cool Blue #4984B8 ΔE 0.085
Use #0198EB 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.