#1D4DB8
Closest named color: Blue Blue (#2242C7). oklch(45.8% 0.177 263), rgb(29, 77, 184).
Aa
White text reads best on this color (7.48:1).
About this color
#1D4DB8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.177 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.034 away. White text reads best on it, at 7.48:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.80:1 |
| White text | 7.48:1 |
Values
| HEX | #1D4DB8 |
| RGB | rgb(29, 77, 184) |
| HSL | hsl(221, 73%, 42%) |
| OKLCH | oklch(45.8% 0.177 263) |
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 #1D4DB8 | 7.48:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #1D4DB8 | 2.80:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #1D4DB8 text on white | 7.48:1 | AAA | Lc 85.4 | Fine for body text |
| #1D4DB8 text on black | 2.80:1 | Fails | Lc -16.7 | Dividers and decoration only |
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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600
#2263F7
oklch(55.6% 0.231 263.1)
-
Step 700
700
#1651D7
oklch(49.1% 0.214 263)
-
Step 800
800 (this color)
#1D4DB8
oklch(45.8% 0.177 263)
-
Step 900
900
#173B89
oklch(37.8% 0.137 262.9)
-
Step 950
950
#0E2350
oklch(26.9% 0.087 263)
#1D4DB8 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) | #005CBC | 0.037 |
| Deuteranopia (no green cones) | #004EB6 | 0.013 |
| Tritanopia (no blue cones) | #00687B | 0.136 |
| Achromatopsia (no color) | #555555 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4DB8
#1D4DB8
oklch(45.8% 0.177 263)
- #715100
#715100
oklch(45.7% 0.094 82.2)
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 #1D4DB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.034
- Sapphire #2138AB ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.058
- Cobalt #1E488F ΔE 0.067
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Blueberry #464196 ΔE 0.072
- Dusk Blue #26538D ΔE 0.073
- Blurple #5539CC ΔE 0.079
Use #1D4DB8 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.