#1558CB
Closest named color: Blue Blue (#2242C7). oklch(49.4% 0.19 260.9), rgb(21, 88, 203).
Aa
White text reads best on this color (6.38:1).
About this color
#1558CB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.190 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.050 away. White text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.29:1 |
| White text | 6.38:1 |
Values
| HEX | #1558CB |
| RGB | rgb(21, 88, 203) |
| HSL | hsl(218, 81%, 44%) |
| OKLCH | oklch(49.4% 0.19 260.9) |
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 #1558CB | 6.38:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #1558CB | 3.29:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #1558CB text on white | 6.38:1 | AA | Lc 81.0 | Fine for body text |
| #1558CB text on black | 3.29:1 | AA large text | Lc -20.9 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC2FD
oklch(81% 0.092 260.7)
-
Step 400
400
#6A9FFC
oklch(70.7% 0.148 261)
-
Step 500
500
#4284F9
oklch(63.2% 0.188 260.9)
-
Step 600
600
#216AE8
oklch(55.7% 0.204 260.8)
-
Step 700
700 (this color)
#1558CB
oklch(49.4% 0.19 260.9)
-
Step 800
800
#1448A3
oklch(42.7% 0.157 260.9)
-
Step 900
900
#173E81
oklch(37.8% 0.122 260.5)
-
Step 950
950
#0F254C
oklch(27.1% 0.078 260.9)
#1558CB 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) | #0067CF | 0.037 |
| Deuteranopia (no green cones) | #0057C9 | 0.009 |
| Tritanopia (no blue cones) | #007589 | 0.144 |
| Achromatopsia (no color) | #5F5F5F | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1558CB
#1558CB
oklch(49.4% 0.19 260.9)
- #7F5A00
#7F5A00
oklch(49.4% 0.102 80.7)
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 #1558CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.050
- Azul #1D5DEC ΔE 0.053
- Warm Blue #4B57DB ΔE 0.054
- Mid Blue #276AB3 ΔE 0.066
- Royal Blue #4169E1 ΔE 0.068
- Neon Blue #4361EE ΔE 0.072
- Majorelle Blue #3F37C9 ΔE 0.072
- Cerulean Blue #056EEE ΔE 0.075
Use #1558CB 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.