#197DA7
Closest named color: Nice Blue (#107AB0). oklch(55.6% 0.107 232.5), rgb(25, 125, 167).
Aa
White text reads best on this color (4.63:1).
About this color
#197DA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.107 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.019 away. White text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.53:1 |
| White text | 4.63:1 |
Values
| HEX | #197DA7 |
| RGB | rgb(25, 125, 167) |
| HSL | hsl(198, 74%, 38%) |
| OKLCH | oklch(55.6% 0.107 232.5) |
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 #197DA7 | 4.63:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #197DA7 | 4.53:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #197DA7 text on white | 4.63:1 | AA | Lc 71.7 | Content text, not long reading |
| #197DA7 text on black | 4.53:1 | AA | Lc -29.9 | 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
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A2C7DB
oklch(80.9% 0.049 231.7)
-
Step 400
400
#6EA9C9
oklch(70.6% 0.077 233.1)
-
Step 500
500
#4393BB
oklch(63% 0.098 233.1)
-
Step 600
600 (this color)
#197DA7
oklch(55.6% 0.107 232.5)
-
Step 700
700
#05698F
oklch(49% 0.099 232.6)
-
Step 800
800
#0E5674
oklch(42.7% 0.082 232.3)
-
Step 900
900
#17475E
oklch(37.7% 0.064 233.1)
-
Step 950
950
#0F2A37
oklch(27.1% 0.041 231.9)
#197DA7 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) | #687CA9 | 0.069 |
| Deuteranopia (no green cones) | #566FA6 | 0.058 |
| Tritanopia (no blue cones) | #00888B | 0.063 |
| Achromatopsia (no color) | #757575 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #197DA7
#197DA7
oklch(55.6% 0.107 232.5)
- #A36032
#A36032
oklch(55.6% 0.106 53.1)
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 #197DA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.019
- Cerulean #457B9D ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.034
- Ocean #017B92 ΔE 0.035
- Muted Blue #3B719F ΔE 0.036
- Sea Blue #047495 ΔE 0.037
- Dull Blue #49759C ΔE 0.037
- Blue NCS #118AB2 ΔE 0.038
Use #197DA7 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.