#197CAA
Closest named color: Nice Blue (#107AB0). oklch(55.5% 0.11 235.2), rgb(25, 124, 170).
Aa
White text reads best on this color (4.66:1).
About this color
#197CAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.110 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.013 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #197CAA |
| RGB | rgb(25, 124, 170) |
| HSL | hsl(199, 74%, 38%) |
| OKLCH | oklch(55.5% 0.11 235.2) |
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 #197CAA | 4.66:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #197CAA | 4.50:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #197CAA text on white | 4.66:1 | AA | Lc 71.9 | Content text, not long reading |
| #197CAA text on black | 4.50:1 | AA | Lc -29.7 | Dividers and decoration only |
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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A2C6DD
oklch(80.8% 0.05 236.3)
-
Step 400
400
#6EA9CB
oklch(70.7% 0.079 234.8)
-
Step 500
500
#4393BE
oklch(63.2% 0.101 235.1)
-
Step 600
600 (this color)
#197CAA
oklch(55.5% 0.11 235.2)
-
Step 700
700
#066992
oklch(49.2% 0.102 234.7)
-
Step 800
800
#0E5577
oklch(42.6% 0.086 236)
-
Step 900
900
#174760
oklch(37.8% 0.066 235.3)
-
Step 950
950
#0F2A38
oklch(27.1% 0.042 233.9)
#197CAA 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) | #657BAC | 0.065 |
| Deuteranopia (no green cones) | #526EA9 | 0.055 |
| Tritanopia (no blue cones) | #00888C | 0.068 |
| Achromatopsia (no color) | #747474 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #197CAA
#197CAA
oklch(55.5% 0.11 235.2)
- #A35F2B
#A35F2B
oklch(55.3% 0.11 55.1)
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 #197CAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.013
- Flat Blue #3C73A8 ΔE 0.030
- Cerulean #457B9D ΔE 0.033
- Muted Blue #3B719F ΔE 0.035
- Dull Blue #49759C ΔE 0.038
- Ocean Blue #03719C ΔE 0.038
- Sea Blue #047495 ΔE 0.039
- Ocean #017B92 ΔE 0.040
Use #197CAA 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.