#0048A3
Closest named color: Cobalt (#1E488F). oklch(42.4% 0.16 258.5), rgb(0, 72, 163).
Aa
White text reads best on this color (8.55:1).
About this color
#0048A3 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.160 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.035 away. White text reads best on it, at 8.55:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #0048A3 |
| RGB | rgb(0, 72, 163) |
| HSL | hsl(213, 100%, 32%) |
| OKLCH | oklch(42.4% 0.16 258.5) |
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 #0048A3 | 8.55:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #0048A3 | 2.45:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #0048A3 text on white | 8.55:1 | AAA | Lc 88.6 | Fine for body text |
| #0048A3 text on black | 2.45:1 | Fails | Lc -13.6 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9CC2FD
oklch(80.8% 0.094 259)
-
Step 400
400
#64A0FD
oklch(70.7% 0.151 258.9)
-
Step 500
500
#3585FA
oklch(63% 0.191 258.4)
-
Step 600
600
#046BE9
oklch(55.5% 0.208 258.5)
-
Step 700
700
#0059C7
oklch(49% 0.186 258.6)
-
Step 800
800 (this color)
#0048A3
oklch(42.4% 0.16 258.5)
-
Step 900
900
#0F3E82
oklch(37.6% 0.125 258.7)
-
Step 950
950
#0B254C
oklch(27% 0.079 258.6)
#0048A3 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) | #0053A6 | 0.030 |
| Deuteranopia (no green cones) | #0046A1 | 0.006 |
| Tritanopia (no blue cones) | #005F6E | 0.121 |
| Achromatopsia (no color) | #4C4C4C | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0048A3
#0048A3
oklch(42.4% 0.16 258.5)
- #684700
#684700
oklch(42.4% 0.088 78.4)
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 #0048A3, closest first.
No curated palette has a color within ΔE 0.04 of #0048A3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.035
- Sapphire #2138AB ΔE 0.040
- Dusk Blue #26538D ΔE 0.056
- Light Navy #155084 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.062
- Blueberry #464196 ΔE 0.065
- Deep Sea Blue #015482 ΔE 0.068
- Twilight Blue #0A437A ΔE 0.068
Use #0048A3 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.