#284FAD
Closest named color: Blue Blue (#2242C7). oklch(45.6% 0.157 264.1), rgb(40, 79, 173).
Aa
White text reads best on this color (7.46:1).
About this color
#284FAD is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.157 and its hue 264°. 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 7.46:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #284FAD |
| RGB | rgb(40, 79, 173) |
| HSL | hsl(222, 62%, 42%) |
| OKLCH | oklch(45.6% 0.157 264.1) |
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 #284FAD | 7.46:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #284FAD | 2.81:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #284FAD text on white | 7.46:1 | AAA | Lc 85.5 | Fine for body text |
| #284FAD text on black | 2.81:1 | Fails | Lc -16.6 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFC
oklch(88.6% 0.051 263.2)
-
Step 300
300
#A3C0FD
oklch(80.9% 0.092 264.7)
-
Step 400
400
#719DFC
oklch(70.6% 0.148 264.2)
-
Step 500
500
#4D81F9
oklch(63% 0.188 264.1)
-
Step 600
600
#3367E8
oklch(55.6% 0.204 264.2)
-
Step 700
700
#2655CA
oklch(49.2% 0.189 264)
-
Step 800
800 (this color)
#284FAD
oklch(45.6% 0.157 264.1)
-
Step 900
900
#1F3C82
oklch(37.7% 0.123 264.3)
-
Step 950
950
#12244C
oklch(27% 0.078 263.8)
#284FAD 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) | #005BB0 | 0.033 |
| Deuteranopia (no green cones) | #004FAB | 0.022 |
| Tritanopia (no blue cones) | #006676 | 0.124 |
| Achromatopsia (no color) | #555555 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284FAD
#284FAD
oklch(45.6% 0.157 264.1)
- #6F5200
#6F5200
oklch(45.7% 0.094 84.9)
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 #284FAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.052
- Cobalt #1E488F ΔE 0.053
- Dusk Blue #26538D ΔE 0.055
- Blueberry #464196 ΔE 0.057
- Sapphire #2138AB ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.063
- Majorelle Blue #3F37C9 ΔE 0.069
- Light Navy #155084 ΔE 0.070
Use #284FAD 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.