#0198BB
Closest named color: Blue NCS (#118AB2). oklch(63% 0.116 221.8), rgb(1, 152, 187).
Aa
Black text reads best on this color (6.21:1).
About this color
#0198BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.116 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.040 away. Black text reads best on it, at 6.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.21:1 |
| White text | 3.38:1 |
Values
| HEX | #0198BB |
| RGB | rgb(1, 152, 187) |
| HSL | hsl(191, 99%, 37%) |
| OKLCH | oklch(63% 0.116 221.8) |
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 #0198BB | 3.38:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #0198BB | 6.21:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #0198BB text on white | 3.38:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #0198BB text on black | 6.21:1 | AA | Lc -41.1 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF2
oklch(93.7% 0.016 221.1)
-
Step 200
200
#C4DEE8
oklch(88.5% 0.031 222.9)
-
Step 300
300
#99CADB
oklch(81% 0.056 221.2)
-
Step 400
400
#59ADC9
oklch(70.6% 0.091 222.2)
-
Step 500
500 (this color)
#0198BB
oklch(63% 0.116 221.8)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#022B37
oklch(26.9% 0.048 222.6)
#0198BB 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) | #8394BD | 0.093 |
| Deuteranopia (no green cones) | #6E85BB | 0.082 |
| Tritanopia (no blue cones) | #00A3A3 | 0.056 |
| Achromatopsia (no color) | #8C8C8C | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0198BB
#0198BB
oklch(63% 0.116 221.8)
- #C3704F
#C3704F
oklch(63% 0.115 42.1)
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 #0198BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.040
- Teal Green #0A9396 ΔE 0.056
- Teal Blue #01889F ΔE 0.056
- Cool Blue #4984B8 ΔE 0.060
- Water Blue #0E87CC ΔE 0.061
- Dusty Blue #5A86AD ΔE 0.062
- Faded Blue #658CBB ΔE 0.063
- Steel Blue #4682B4 ΔE 0.063
Use #0198BB 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.