#197D9F
Closest named color: Ocean (#017B92). oklch(55.2% 0.1 227), rgb(25, 125, 159).
Aa
White text reads best on this color (4.69:1).
About this color
#197D9F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.100 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.023 away. White text reads best on it, at 4.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #197D9F |
| RGB | rgb(25, 125, 159) |
| HSL | hsl(195, 73%, 36%) |
| OKLCH | oklch(55.2% 0.1 227) |
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 #197D9F | 4.69:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #197D9F | 4.47:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #197D9F text on white | 4.69:1 | AA | Lc 72.2 | Content text, not long reading |
| #197D9F text on black | 4.47:1 | AA large text | Lc -29.5 | 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
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D7
oklch(80.9% 0.045 226.7)
-
Step 400
400
#6FAAC4
oklch(70.7% 0.072 227.6)
-
Step 500
500
#4494B4
oklch(63% 0.091 227.2)
-
Step 600
600 (this color)
#197D9F
oklch(55.2% 0.1 227)
-
Step 700
700
#086A89
oklch(49% 0.093 227.3)
-
Step 800
800
#0F576F
oklch(42.7% 0.076 226.4)
-
Step 900
900
#17485A
oklch(37.8% 0.06 226.2)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#197D9F 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) | #6B7BA1 | 0.073 |
| Deuteranopia (no green cones) | #596E9F | 0.064 |
| Tritanopia (no blue cones) | #008788 | 0.055 |
| Achromatopsia (no color) | #747474 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #197D9F
#197D9F
oklch(55.2% 0.1 227)
- #A15E3C
#A15E3C
oklch(55.1% 0.1 46.8)
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 #197D9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.023
- Cerulean #457B9D ΔE 0.029
- Sea Blue #047495 ΔE 0.030
- Nice Blue #107AB0 ΔE 0.031
- Teal Blue #01889F ΔE 0.033
- Dull Blue #49759C ΔE 0.037
- Ocean Blue #03719C ΔE 0.038
- Muted Blue #3B719F ΔE 0.038
Use #197D9F 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.