#2558C4
Closest named color: Blue Blue (#2242C7). oklch(49.2% 0.178 262.7), rgb(37, 88, 196).
Aa
White text reads best on this color (6.41:1).
About this color
#2558C4 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.178 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.052 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #2558C4 |
| RGB | rgb(37, 88, 196) |
| HSL | hsl(221, 68%, 46%) |
| OKLCH | oklch(49.2% 0.178 262.7) |
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 #2558C4 | 6.41:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #2558C4 | 3.27:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #2558C4 text on white | 6.41:1 | AA | Lc 81.3 | Fine for body text |
| #2558C4 text on black | 3.27:1 | AA large text | Lc -20.6 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAFA
oklch(88.6% 0.048 263.1)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#729FF6
oklch(70.8% 0.137 262.6)
-
Step 500
500
#4D84F2
oklch(63.1% 0.175 262.5)
-
Step 600
600
#316AE1
oklch(55.6% 0.191 262.6)
-
Step 700
700 (this color)
#2558C4
oklch(49.2% 0.178 262.7)
-
Step 800
800
#1F489E
oklch(42.6% 0.148 262.7)
-
Step 900
900
#1F3E7E
oklch(37.9% 0.115 262.7)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#2558C4 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) | #0066C8 | 0.036 |
| Deuteranopia (no green cones) | #0058C2 | 0.017 |
| Tritanopia (no blue cones) | #007385 | 0.139 |
| Achromatopsia (no color) | #5F5F5F | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2558C4
#2558C4
oklch(49.2% 0.178 262.7)
- #7D5B00
#7D5B00
oklch(49.4% 0.101 83.2)
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 #2558C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.054
- Mid Blue #276AB3 ΔE 0.058
- Azul #1D5DEC ΔE 0.063
- Royal Blue #4169E1 ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.071
- Iris #6258C4 ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
Use #2558C4 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.