#284BDE
Closest named color: Blue Blue (#2242C7). oklch(49.2% 0.226 266.7), rgb(40, 75, 222).
Aa
White text reads best on this color (6.66:1).
About this color
#284BDE is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.226 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.043 away. White text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.226) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #284BDE |
| RGB | rgb(40, 75, 222) |
| HSL | hsl(228, 73%, 51%) |
| OKLCH | oklch(49.2% 0.226 266.7) |
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 #284BDE | 6.66:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #284BDE | 3.15:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #284BDE text on white | 6.66:1 | AA | Lc 82.0 | Fine for body text |
| #284BDE text on black | 3.15:1 | AA large text | Lc -19.9 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#345DFE
oklch(55.6% 0.242 266.7)
-
Step 700
700 (this color)
#284BDE
oklch(49.2% 0.226 266.7)
-
Step 800
800
#213FB3
oklch(42.7% 0.187 266.6)
-
Step 900
900
#1E388D
oklch(37.8% 0.145 266.4)
-
Step 950
950
#122253
oklch(27.1% 0.092 266.6)
#284BDE 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) | #0065E3 | 0.057 |
| Deuteranopia (no green cones) | #0054DB | 0.023 |
| Tritanopia (no blue cones) | #00738E | 0.174 |
| Achromatopsia (no color) | #5C5C5C | 0.226 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284BDE
#284BDE
oklch(49.2% 0.226 266.7)
- #7A5C00
#7A5C00
oklch(49.2% 0.101 86.4)
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 #284BDE, closest first.
No curated palette has a color within ΔE 0.04 of #284BDE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.043
- Azul #1D5DEC ΔE 0.044
- Warm Blue #4B57DB ΔE 0.050
- Electric Blue #0652FF ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.055
- Vibrant Blue #0339F8 ΔE 0.055
- Light Royal Blue #3A2EFE ΔE 0.062
- Neon Blue #4361EE ΔE 0.066
Use #284BDE 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.