#1D48A5
Closest named color: Cobalt (#1E488F). oklch(43.1% 0.158 262.9), rgb(29, 72, 165).
Aa
White text reads best on this color (8.32:1).
About this color
#1D48A5 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.158 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.036 away. White text reads best on it, at 8.32:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.52:1 |
| White text | 8.32:1 |
Values
| HEX | #1D48A5 |
| RGB | rgb(29, 72, 165) |
| HSL | hsl(221, 70%, 38%) |
| OKLCH | oklch(43.1% 0.158 262.9) |
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 #1D48A5 | 8.32:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #1D48A5 | 2.52:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #1D48A5 text on white | 8.32:1 | AAA | Lc 88.2 | Fine for body text |
| #1D48A5 text on black | 2.52:1 | Fails | Lc -14.0 | 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 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
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#A1C1FD
oklch(80.9% 0.092 262.7)
-
Step 400
400
#6E9EFC
oklch(70.7% 0.148 262.7)
-
Step 500
500
#4982FA
oklch(63.1% 0.189 263)
-
Step 600
600
#2C68E9
oklch(55.6% 0.205 262.8)
-
Step 700
700
#2055CA
oklch(49% 0.191 263)
-
Step 800
800 (this color)
#1D48A5
oklch(43.1% 0.158 262.9)
-
Step 900
900
#1C3D82
oklch(37.8% 0.123 262.8)
-
Step 950
950
#11244C
oklch(27% 0.078 263.1)
#1D48A5 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) | #0054A8 | 0.031 |
| Deuteranopia (no green cones) | #0048A3 | 0.015 |
| Tritanopia (no blue cones) | #005F6F | 0.122 |
| Achromatopsia (no color) | #4E4E4E | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D48A5
#1D48A5
oklch(43.1% 0.158 262.9)
- #684B00
#684B00
oklch(43.3% 0.089 83)
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 #1D48A5, closest first.
No curated palette has a color within ΔE 0.04 of #1D48A5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.036
- Sapphire #2138AB ΔE 0.039
- Blueberry #464196 ΔE 0.053
- Dusk Blue #26538D ΔE 0.053
- Blue Blue #2242C7 ΔE 0.056
- Light Navy #155084 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.067
- Deep Sea Blue #015482 ΔE 0.072
Use #1D48A5 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.