#197AEA
Closest named color: Clear Blue (#247AFD). oklch(59% 0.189 256.1), rgb(25, 122, 234).
Aa
Black text reads best on this color (5.01:1).
About this color
#197AEA is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.189 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.029 away. Black text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #197AEA |
| RGB | rgb(25, 122, 234) |
| HSL | hsl(212, 83%, 51%) |
| OKLCH | oklch(59% 0.189 256.1) |
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 #197AEA | 4.18:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #197AEA | 5.01:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #197AEA text on white | 4.18:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #197AEA text on black | 5.01:1 | AA | Lc -33.4 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9DC3F8
oklch(80.9% 0.086 256.8)
-
Step 400
400
#65A2F4
oklch(70.6% 0.137 256.2)
-
Step 500
500
#3788F0
oklch(63.1% 0.175 256.3)
-
Step 600
600 (this color)
#197AEA
oklch(59% 0.189 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#014C9C
oklch(42.7% 0.146 256.1)
-
Step 900
900
#0F407C
oklch(37.6% 0.114 256.2)
-
Step 950
950
#0B2649
oklch(27% 0.073 256.3)
#197AEA 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) | #3785EE | 0.036 |
| Deuteranopia (no green cones) | #0073E8 | 0.021 |
| Tritanopia (no blue cones) | #0095A7 | 0.141 |
| Achromatopsia (no color) | #7C7C7C | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #197AEA
#197AEA
oklch(59% 0.189 256.1)
- #A77100
#A77100
oklch(59% 0.124 75.7)
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 #197AEA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.029
- Cerulean Blue #056EEE ΔE 0.033
- Royal Blue #4169E1 ΔE 0.045
- Bright Blue #0165FC ΔE 0.060
- Neon Blue #4361EE ΔE 0.062
- Water Blue #0E87CC ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.063
- Dark Sky Blue #448EE4 ΔE 0.065
Use #197AEA 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.