#1664C1
Closest named color: Mid Blue (#276AB3). oklch(51.2% 0.163 256.3), rgb(22, 100, 193).
Aa
White text reads best on this color (5.78:1).
About this color
#1664C1 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.163 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #1664C1 |
| RGB | rgb(22, 100, 193) |
| HSL | hsl(213, 80%, 42%) |
| OKLCH | oklch(51.2% 0.163 256.3) |
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 #1664C1 | 5.78:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #1664C1 | 3.62:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #1664C1 text on white | 5.78:1 | AA | Lc 78.4 | Fine for body text |
| #1664C1 text on black | 3.62:1 | AA large text | Lc -23.4 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6BA2EE
oklch(70.6% 0.126 256.7)
-
Step 500
500
#4089E8
oklch(63.1% 0.161 256.2)
-
Step 600
600
#1C71D6
oklch(55.7% 0.174 256.1)
-
Step 700
700 (this color)
#1664C1
oklch(51.2% 0.163 256.3)
-
Step 800
800
#104D96
oklch(42.7% 0.134 256.2)
-
Step 900
900
#164178
oklch(37.8% 0.105 256.3)
-
Step 950
950
#0E2646
oklch(26.9% 0.067 256.5)
#1664C1 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) | #2D6DC4 | 0.030 |
| Deuteranopia (no green cones) | #005FBF | 0.017 |
| Tritanopia (no blue cones) | #007B89 | 0.123 |
| Achromatopsia (no color) | #656565 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1664C1
#1664C1
oklch(51.2% 0.163 256.3)
- #895D00
#895D00
oklch(51.3% 0.107 76.7)
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 #1664C1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- French Blue #436BAD ΔE 0.053
- Royal Blue #4169E1 ΔE 0.062
- Windows Blue #3778BF ΔE 0.063
- Warm Blue #4B57DB ΔE 0.067
- Azul #1D5DEC ΔE 0.070
- Flat Blue #3C73A8 ΔE 0.070
- Nice Blue #107AB0 ΔE 0.072
Use #1664C1 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.