#1553CB
Closest named color: Blue Blue (#2242C7). oklch(48.4% 0.196 261.9), rgb(21, 83, 203).
Aa
White text reads best on this color (6.70:1).
About this color
#1553CB is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.196 and its hue 262°. 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 6.70:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.196) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.13:1 |
| White text | 6.70:1 |
Values
| HEX | #1553CB |
| RGB | rgb(21, 83, 203) |
| HSL | hsl(220, 81%, 44%) |
| OKLCH | oklch(48.4% 0.196 261.9) |
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 #1553CB | 6.70:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #1553CB | 3.13:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #1553CB text on white | 6.70:1 | AA | Lc 82.3 | Fine for body text |
| #1553CB 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
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500
#4382FD
oklch(63.1% 0.195 262)
-
Step 600
600
#2468EC
oklch(55.6% 0.211 261.9)
-
Step 700
700 (this color)
#1553CB
oklch(48.4% 0.196 261.9)
-
Step 800
800
#1647A6
oklch(42.8% 0.162 261.8)
-
Step 900
900
#183D83
oklch(37.7% 0.126 261.6)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#1553CB 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) | #0064CF | 0.042 |
| Deuteranopia (no green cones) | #0054C9 | 0.008 |
| Tritanopia (no blue cones) | #007287 | 0.150 |
| Achromatopsia (no color) | #5C5C5C | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1553CB
#1553CB
oklch(48.4% 0.196 261.9)
- #7B5800
#7B5800
oklch(48.5% 0.1 81.7)
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 #1553CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Azul #1D5DEC ΔE 0.057
- Warm Blue #4B57DB ΔE 0.058
- Majorelle Blue #3F37C9 ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Mid Blue #276AB3 ΔE 0.076
- Royal Blue #4169E1 ΔE 0.078
- Neon Blue #4361EE ΔE 0.078
Use #1553CB 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.