#2558D8
Closest named color: Azul (#1D5DEC). oklch(50.9% 0.204 264), rgb(37, 88, 216).
Aa
White text reads best on this color (6.05:1).
About this color
#2558D8 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.204 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.033 away. White text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.46:1 |
| White text | 6.05:1 |
Values
| HEX | #2558D8 |
| RGB | rgb(37, 88, 216) |
| HSL | hsl(223, 71%, 50%) |
| OKLCH | oklch(50.9% 0.204 264) |
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 #2558D8 | 6.05:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #2558D8 | 3.46:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #2558D8 text on white | 6.05:1 | AA | Lc 79.6 | Fine for body text |
| #2558D8 text on black | 3.46:1 | AA large text | Lc -22.3 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4980FF
oklch(63% 0.198 264)
-
Step 600
600
#2C65F1
oklch(55.7% 0.219 263.8)
-
Step 700
700 (this color)
#2558D8
oklch(50.9% 0.204 264)
-
Step 800
800
#1C44A9
oklch(42.6% 0.168 264)
-
Step 900
900
#1C3B86
oklch(37.7% 0.131 264.1)
-
Step 950
950
#11234F
oklch(27% 0.084 264.6)
#2558D8 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) | #006BDC | 0.045 |
| Deuteranopia (no green cones) | #005AD6 | 0.015 |
| Tritanopia (no blue cones) | #00798F | 0.158 |
| Achromatopsia (no color) | #626262 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2558D8
#2558D8
oklch(50.9% 0.204 264)
- #825F00
#825F00
oklch(50.8% 0.104 83.4)
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 #2558D8, closest first.
No curated palette has a color within ΔE 0.04 of #2558D8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.033
- Warm Blue #4B57DB ΔE 0.038
- Neon Blue #4361EE ΔE 0.051
- Royal Blue #4169E1 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.060
- Electric Blue #0652FF ΔE 0.062
- Bright Blue #0165FC ΔE 0.062
Use #2558D8 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.