#284A73
Closest named color: Light Navy (#155084). oklch(40.4% 0.08 254.2), rgb(40, 74, 115).
Aa
White text reads best on this color (9.06:1).
About this color
#284A73 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.080 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.031 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #284A73 |
| RGB | rgb(40, 74, 115) |
| HSL | hsl(213, 48%, 30%) |
| OKLCH | oklch(40.4% 0.08 254.2) |
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 #284A73 | 9.06:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #284A73 | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #284A73 text on white | 9.06:1 | AAA | Lc 90.7 | Preferred for body text |
| #284A73 text on black | 2.31:1 | Fails | Lc -11.7 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ACC3DF
oklch(80.9% 0.047 253.5)
-
Step 400
400
#80A3CF
oklch(70.6% 0.076 254.4)
-
Step 500
500
#608CC2
oklch(63.1% 0.095 254.1)
-
Step 600
600
#4675AF
oklch(55.5% 0.105 254.5)
-
Step 700
700
#376296
oklch(49% 0.097 254.2)
-
Step 800
800 (this color)
#284A73
oklch(40.4% 0.08 254.2)
-
Step 900
900
#294362
oklch(37.7% 0.062 253.6)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#284A73 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) | #384D75 | 0.022 |
| Deuteranopia (no green cones) | #2E4572 | 0.015 |
| Tritanopia (no blue cones) | #005359 | 0.065 |
| Achromatopsia (no color) | #494949 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284A73
#284A73
oklch(40.4% 0.08 254.2)
- #62410A
#62410A
oklch(40.3% 0.08 73.9)
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 #284A73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.040
- Dusk Blue #26538D ΔE 0.047
- Cobalt #1E488F ΔE 0.049
- Charcoal #264653 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.056
Use #284A73 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.