#284D93
Closest named color: Cobalt (#1E488F). oklch(43.2% 0.123 261.7), rgb(40, 77, 147).
Aa
White text reads best on this color (8.16:1).
About this color
#284D93 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.123 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.019 away. White text reads best on it, at 8.16:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.57:1 |
| White text | 8.16:1 |
Values
| HEX | #284D93 |
| RGB | rgb(40, 77, 147) |
| HSL | hsl(219, 57%, 37%) |
| OKLCH | oklch(43.2% 0.123 261.7) |
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 #284D93 | 8.16:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #284D93 | 2.57:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #284D93 text on white | 8.16:1 | AAA | Lc 87.9 | Fine for body text |
| #284D93 text on black | 2.57:1 | Fails | Lc -14.2 | Not readable |
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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A7C1F0
oklch(80.8% 0.073 262.2)
-
Step 400
400
#78A0E8
oklch(70.6% 0.115 261.6)
-
Step 500
500
#5687E1
oklch(63.1% 0.146 261.6)
-
Step 600
600
#3B6ECF
oklch(55.5% 0.16 261.8)
-
Step 700
700
#2E5CB4
oklch(49.2% 0.149 261.8)
-
Step 800
800 (this color)
#284D93
oklch(43.2% 0.123 261.7)
-
Step 900
900
#244074
oklch(37.8% 0.095 261.6)
-
Step 950
950
#152644
oklch(27.1% 0.061 261)
#284D93 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) | #285496 | 0.020 |
| Deuteranopia (no green cones) | #104B92 | 0.019 |
| Tritanopia (no blue cones) | #005D69 | 0.097 |
| Achromatopsia (no color) | #4F4F4F | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284D93
#284D93
oklch(43.2% 0.123 261.7)
- #694A00
#694A00
oklch(43.2% 0.089 81)
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 #284D93, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.019
- Dusk Blue #26538D ΔE 0.021
- Light Navy #155084 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.046
- Blueberry #464196 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.048
- Twilight #4E518B ΔE 0.052
Use #284D93 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.