#198ACD
Closest named color: Water Blue (#0E87CC). oklch(60.7% 0.137 242.2), rgb(25, 138, 205).
Aa
Black text reads best on this color (5.55:1).
About this color
#198ACD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.137 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.010 away. Black text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.55:1 |
| White text | 3.77:1 |
Values
| HEX | #198ACD |
| RGB | rgb(25, 138, 205) |
| HSL | hsl(202, 78%, 45%) |
| OKLCH | oklch(60.7% 0.137 242.2) |
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 #198ACD | 3.77:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #198ACD | 5.55:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #198ACD text on white | 3.77:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #198ACD text on black | 5.55:1 | AA | Lc -36.9 | 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 500.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDF0
oklch(88.6% 0.037 241.8)
-
Step 300
300
#9BC7E9
oklch(81% 0.067 241.8)
-
Step 400
400
#5FA8DE
oklch(70.6% 0.108 242.4)
-
Step 500
500 (this color)
#198ACD
oklch(60.7% 0.137 242.2)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00679D
oklch(49.2% 0.117 242)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950
#072940
oklch(27% 0.057 243.1)
#198ACD 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) | #6A8CD0 | 0.064 |
| Deuteranopia (no green cones) | #517CCC | 0.048 |
| Tritanopia (no blue cones) | #009BA2 | 0.094 |
| Achromatopsia (no color) | #838383 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #198ACD
#198ACD
oklch(60.7% 0.137 242.2)
- #BB6C07
#BB6C07
oklch(60.7% 0.138 62.1)
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 #198ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.010
- Cool Blue #4984B8 ΔE 0.039
- Blue NCS #118AB2 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.046
- Windows Blue #3778BF ΔE 0.050
- Off Blue #5684AE ΔE 0.057
- Nice Blue #107AB0 ΔE 0.059
Use #198ACD 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.