#284871
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.079 255.4), rgb(40, 72, 113).
Aa
White text reads best on this color (9.31:1).
About this color
#284871 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.079 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #284871 |
| RGB | rgb(40, 72, 113) |
| HSL | hsl(214, 48%, 30%) |
| OKLCH | oklch(39.8% 0.079 255.4) |
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 #284871 | 9.31:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #284871 | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #284871 text on white | 9.31:1 | AAA | Lc 91.3 | Preferred for body text |
| #284871 text on black | 2.25:1 | Fails | Lc -11.0 | 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 900.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#78A3DB
oklch(70.6% 0.095 255.3)
-
Step 500
500
#548BD2
oklch(63% 0.123 255.5)
-
Step 600
600
#3874BF
oklch(55.6% 0.133 255.3)
-
Step 700
700
#2A61A5
oklch(49.1% 0.124 255.3)
-
Step 800
800
#244F85
oklch(42.6% 0.102 255.4)
-
Step 900
900 (this color)
#284871
oklch(39.8% 0.079 255.4)
-
Step 950
950
#15273F
oklch(27% 0.051 256.1)
#284871 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) | #374B73 | 0.022 |
| Deuteranopia (no green cones) | #2D4470 | 0.012 |
| Tritanopia (no blue cones) | #005157 | 0.065 |
| Achromatopsia (no color) | #474747 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284871
#284871
oklch(39.8% 0.079 255.4)
- #604008
#604008
oklch(39.8% 0.08 74.9)
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 #284871, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Light Navy #155084 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.043
- Cobalt #1E488F ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Dusk Blue #26538D ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.062
Use #284871 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.