#284CAC
Closest named color: Blue Blue (#2242C7). oklch(44.9% 0.159 265), rgb(40, 76, 172).
Aa
White text reads best on this color (7.72:1).
About this color
#284CAC is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.159 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #284CAC |
| RGB | rgb(40, 76, 172) |
| HSL | hsl(224, 62%, 42%) |
| OKLCH | oklch(44.9% 0.159 265) |
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 #284CAC | 7.72:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #284CAC | 2.71:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #284CAC text on white | 7.72:1 | AAA | Lc 86.3 | Fine for body text |
| #284CAC text on black | 2.71:1 | Fails | Lc -15.7 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A3C0FE
oklch(80.9% 0.094 265)
-
Step 400
400
#729DFD
oklch(70.7% 0.149 264.7)
-
Step 500
500
#4F80FB
oklch(63% 0.191 265)
-
Step 600
600
#3566EA
oklch(55.6% 0.207 264.9)
-
Step 700
700
#2953CC
oklch(49% 0.193 265.2)
-
Step 800
800 (this color)
#284CAC
oklch(44.9% 0.159 265)
-
Step 900
900
#203C82
oklch(37.8% 0.123 264.7)
-
Step 950
950
#13244C
oklch(27.1% 0.077 264.5)
#284CAC 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) | #0059AF | 0.035 |
| Deuteranopia (no green cones) | #004DAA | 0.022 |
| Tritanopia (no blue cones) | #006474 | 0.127 |
| Achromatopsia (no color) | #535353 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284CAC
#284CAC
oklch(44.9% 0.159 265)
- #6C5000
#6C5000
oklch(44.9% 0.092 85.2)
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 #284CAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Cobalt #1E488F ΔE 0.050
- Sapphire #2138AB ΔE 0.050
- Blueberry #464196 ΔE 0.053
- Dusk Blue #26538D ΔE 0.056
- Majorelle Blue #3F37C9 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.067
- Light Navy #155084 ΔE 0.070
Use #284CAC 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.