#197DE0
Closest named color: Water Blue (#0E87CC). oklch(58.9% 0.173 253.5), rgb(25, 125, 224).
Aa
Black text reads best on this color (5.05:1).
About this color
#197DE0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.173 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.045 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #197DE0 |
| RGB | rgb(25, 125, 224) |
| HSL | hsl(210, 80%, 49%) |
| OKLCH | oklch(58.9% 0.173 253.5) |
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 #197DE0 | 4.15:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #197DE0 | 5.05:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #197DE0 text on white | 4.15:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #197DE0 text on black | 5.05:1 | AA | Lc -33.6 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9EC4F2
oklch(80.9% 0.077 253.5)
-
Step 400
400
#66A4EC
oklch(70.7% 0.124 253.2)
-
Step 500
500
#388BE6
oklch(63.1% 0.159 253.4)
-
Step 600
600 (this color)
#197DE0
oklch(58.9% 0.173 253.5)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004E95
oklch(42.6% 0.134 253.6)
-
Step 900
900
#104277
oklch(37.8% 0.104 253.6)
-
Step 950
950
#0C2746
oklch(27.1% 0.066 254)
#197DE0 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) | #4885E4 | 0.040 |
| Deuteranopia (no green cones) | #1A74DE | 0.024 |
| Tritanopia (no blue cones) | #0095A3 | 0.129 |
| Achromatopsia (no color) | #7C7C7C | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #197DE0
#197DE0
oklch(58.9% 0.173 253.5)
- #A96F00
#A96F00
oklch(58.9% 0.125 73.1)
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 #197DE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.045
- Clear Blue #247AFD ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.047
- Windows Blue #3778BF ΔE 0.051
- Royal Blue #4169E1 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.057
- Dodger Blue #1E90FF ΔE 0.065
- Soft Blue #6488EA ΔE 0.071
Use #197DE0 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.