#1B53CA
Closest named color: Blue Blue (#2242C7). oklch(48.5% 0.194 262.6), rgb(27, 83, 202).
Aa
White text reads best on this color (6.69:1).
About this color
#1B53CA is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.194 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.038 away. White text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #1B53CA |
| RGB | rgb(27, 83, 202) |
| HSL | hsl(221, 76%, 45%) |
| OKLCH | oklch(48.5% 0.194 262.6) |
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 #1B53CA | 6.69:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #1B53CA | 3.13:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #1B53CA text on white | 6.69:1 | AA | Lc 82.3 | Fine for body text |
| #1B53CA text on black | 3.13:1 | AA large text | Lc -19.6 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFD
oklch(88.5% 0.053 262.7)
-
Step 300
300
#A0C1FE
oklch(80.9% 0.094 262.4)
-
Step 400
400
#6D9EFE
oklch(70.7% 0.151 262.7)
-
Step 500
500
#4782FC
oklch(63.1% 0.192 262.8)
-
Step 600
600
#2968EB
oklch(55.7% 0.209 262.5)
-
Step 700
700 (this color)
#1B53CA
oklch(48.5% 0.194 262.6)
-
Step 800
800
#1A46A5
oklch(42.6% 0.161 262.8)
-
Step 900
900
#1B3C83
oklch(37.6% 0.126 263)
-
Step 950
950
#10244D
oklch(27% 0.08 262.7)
#1B53CA 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) | #0064CE | 0.041 |
| Deuteranopia (no green cones) | #0054C8 | 0.010 |
| Tritanopia (no blue cones) | #007286 | 0.150 |
| Achromatopsia (no color) | #5C5C5C | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B53CA
#1B53CA
oklch(48.5% 0.194 262.6)
- #7A5800
#7A5800
oklch(48.3% 0.1 82.4)
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 #1B53CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Warm Blue #4B57DB ΔE 0.056
- Azul #1D5DEC ΔE 0.058
- Majorelle Blue #3F37C9 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Mid Blue #276AB3 ΔE 0.075
- Royal Blue #4169E1 ΔE 0.077
- Blurple #5539CC ΔE 0.077
Use #1B53CA 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.