#1D429B
Closest named color: Cobalt (#1E488F). oklch(41% 0.152 263.9), rgb(29, 66, 155).
Aa
White text reads best on this color (9.11:1).
About this color
#1D429B is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.152 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.027 away. White text reads best on it, at 9.11:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #1D429B |
| RGB | rgb(29, 66, 155) |
| HSL | hsl(222, 68%, 36%) |
| OKLCH | oklch(41% 0.152 263.9) |
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 #1D429B | 9.11:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #1D429B | 2.30:1 | Fails | Lc 13.6 | Not readable |
| #1D429B text on white | 9.11:1 | AAA | Lc 90.4 | Preferred for body text |
| #1D429B text on black | 2.30:1 | Fails | Lc -11.9 | 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
#C9DAFB
oklch(88.6% 0.049 263.7)
-
Step 300
300
#A3C1FB
oklch(81% 0.089 263.3)
-
Step 400
400
#739EF9
oklch(70.8% 0.142 264)
-
Step 500
500
#4F82F6
oklch(63.1% 0.182 264)
-
Step 600
600
#3468E4
oklch(55.5% 0.197 263.9)
-
Step 700
700
#2756C6
oklch(49.1% 0.182 263.7)
-
Step 800
800 (this color)
#1D429B
oklch(41% 0.152 263.9)
-
Step 900
900
#203D7F
oklch(37.7% 0.117 263.8)
-
Step 950
950
#13244B
oklch(27% 0.076 264.2)
#1D429B 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) | #004E9E | 0.032 |
| Deuteranopia (no green cones) | #004399 | 0.016 |
| Tritanopia (no blue cones) | #005868 | 0.117 |
| Achromatopsia (no color) | #484848 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D429B
#1D429B
oklch(41% 0.152 263.9)
- #604600
#604600
oklch(41.1% 0.084 84.3)
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 #1D429B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.027
- Sapphire #2138AB ΔE 0.035
- Blueberry #464196 ΔE 0.051
- Dusk Blue #26538D ΔE 0.057
- Light Navy #155084 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.070
Use #1D429B 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.