#1D4263
Closest named color: Dark Grey Blue (#29465B). oklch(36.9% 0.071 247.9), rgb(29, 66, 99).
Aa
White text reads best on this color (10.43:1).
About this color
#1D4263 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.071 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.43:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.43:1 |
Values
| HEX | #1D4263 |
| RGB | rgb(29, 66, 99) |
| HSL | hsl(208, 55%, 25%) |
| OKLCH | oklch(36.9% 0.071 247.9) |
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 #1D4263 | 10.43:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #1D4263 | 2.01:1 | Fails | Lc 9.9 | Not readable |
| #1D4263 text on white | 10.43:1 | AAA | Lc 94.0 | Preferred for body text |
| #1D4263 text on black | 2.01:1 | Fails | Lc -8.5 | 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 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBEC
oklch(88.4% 0.03 248.2)
-
Step 300
300
#A6C4E2
oklch(80.8% 0.054 248.5)
-
Step 400
400
#75A6D4
oklch(70.8% 0.086 247.6)
-
Step 500
500
#4F8EC8
oklch(63% 0.11 248.1)
-
Step 600
600
#3178B5
oklch(55.7% 0.118 247.8)
-
Step 700
700
#23649C
oklch(49% 0.111 248.4)
-
Step 800
800
#1F527E
oklch(42.7% 0.091 248)
-
Step 900
900 (this color)
#1D4263
oklch(36.9% 0.071 247.9)
-
Step 950
950
#13283B
oklch(26.9% 0.045 247.5)
#1D4263 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) | #334364 | 0.026 |
| Deuteranopia (no green cones) | #2A3D62 | 0.019 |
| Tritanopia (no blue cones) | #004A4E | 0.054 |
| Achromatopsia (no color) | #404040 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4263
#1D4263
oklch(36.9% 0.071 247.9)
- #58370E
#58370E
oklch(36.8% 0.071 67.3)
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 #1D4263, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.040
- Marine Blue #01386A ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.043
- Midnight Green #073B4C ΔE 0.048
- Dark Teal #014D4E ΔE 0.061
Use #1D4263 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.