#4555DD
Closest named color: Warm Blue (#4B57DB). oklch(52.1% 0.206 272), rgb(69, 85, 221).
Aa
White text reads best on this color (5.83:1).
About this color
#4555DD is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.206 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.010 away. White text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.206) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #4555DD |
| RGB | rgb(69, 85, 221) |
| HSL | hsl(234, 69%, 57%) |
| OKLCH | oklch(52.1% 0.206 272) |
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 #4555DD | 5.83:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #4555DD | 3.59:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #4555DD text on white | 5.83:1 | AA | Lc 78.6 | Fine for body text |
| #4555DD text on black | 3.59:1 | AA large text | Lc -23.2 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8098FF
oklch(70.7% 0.153 272.1)
-
Step 500
500
#627AFF
oklch(63.1% 0.198 271.8)
-
Step 600
600
#4C5DF2
oklch(55.7% 0.221 272)
-
Step 700
700 (this color)
#4555DD
oklch(52.1% 0.206 272)
-
Step 800
800
#323FAA
oklch(42.7% 0.17 271.7)
-
Step 900
900
#2B3787
oklch(37.7% 0.134 271.9)
-
Step 950
950
#19214F
oklch(27% 0.085 272.1)
#4555DD 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) | #006CE1 | 0.060 |
| Deuteranopia (no green cones) | #005EDA | 0.045 |
| Tritanopia (no blue cones) | #007891 | 0.167 |
| Achromatopsia (no color) | #656565 | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4555DD
#4555DD
oklch(52.1% 0.206 272)
- #7F6600
#7F6600
oklch(52% 0.106 91.9)
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 #4555DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.010
- Neon Blue #4361EE ΔE 0.037
- Azul #1D5DEC ΔE 0.041
- Royal Blue #4169E1 ΔE 0.046
- Iris #6258C4 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.060
- Light Indigo #6D5ACF ΔE 0.064
Use #4555DD 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.