#1966C9
Closest named color: Mid Blue (#276AB3). oklch(52.3% 0.17 257.3), rgb(25, 102, 201).
Aa
White text reads best on this color (5.54:1).
About this color
#1966C9 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.170 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.038 away. White text reads best on it, at 5.54:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #1966C9 |
| RGB | rgb(25, 102, 201) |
| HSL | hsl(214, 78%, 44%) |
| OKLCH | oklch(52.3% 0.17 257.3) |
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 #1966C9 | 5.54:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #1966C9 | 3.78:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #1966C9 text on white | 5.54:1 | AA | Lc 77.1 | Fine for body text |
| #1966C9 text on black | 3.78:1 | AA large text | Lc -24.6 | 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 700.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#6AA2F2
oklch(70.8% 0.132 257.4)
-
Step 500
500
#3F88ED
oklch(63.1% 0.169 257.3)
-
Step 600
600
#1A6FDB
oklch(55.6% 0.183 257.3)
-
Step 700
700 (this color)
#1966C9
oklch(52.3% 0.17 257.3)
-
Step 800
800
#0E4C9A
oklch(42.7% 0.141 257.2)
-
Step 900
900
#15407A
oklch(37.6% 0.109 257.2)
-
Step 950
950
#0E2648
oklch(27% 0.07 257.6)
#1966C9 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) | #2870CD | 0.030 |
| Deuteranopia (no green cones) | #0061C7 | 0.017 |
| Tritanopia (no blue cones) | #007E8E | 0.128 |
| Achromatopsia (no color) | #686868 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1966C9
#1966C9
oklch(52.3% 0.17 257.3)
- #8C6000
#8C6000
oklch(52.3% 0.109 77.5)
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 #1966C9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.038
- Royal Blue #4169E1 ΔE 0.050
- French Blue #436BAD ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.059
- Azul #1D5DEC ΔE 0.059
- Warm Blue #4B57DB ΔE 0.059
- Windows Blue #3778BF ΔE 0.060
- Neon Blue #4361EE ΔE 0.067
Use #1966C9 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.