#1D4663
Closest named color: Dark Grey Blue (#29465B). oklch(37.9% 0.068 242.3), rgb(29, 70, 99).
Aa
White text reads best on this color (9.95:1).
About this color
#1D4663 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.068 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.017 away. White text reads best on it, at 9.95:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.10:1 |
| White text | 9.95:1 |
Values
| HEX | #1D4663 |
| RGB | rgb(29, 70, 99) |
| HSL | hsl(205, 55%, 25%) |
| OKLCH | oklch(37.9% 0.068 242.3) |
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 #1D4663 | 9.95:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #1D4663 | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #1D4663 text on white | 9.95:1 | AAA | Lc 92.9 | Preferred for body text |
| #1D4663 text on black | 2.10:1 | Fails | Lc -9.6 | 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 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5DF
oklch(80.9% 0.05 242.9)
-
Step 400
400
#73A7CF
oklch(70.7% 0.081 242.4)
-
Step 500
500
#4B90C3
oklch(63% 0.104 242.8)
-
Step 600
600
#2A7AAF
oklch(55.6% 0.112 242.2)
-
Step 700
700
#1B6697
oklch(49% 0.105 242.8)
-
Step 800
800
#1A547A
oklch(42.8% 0.086 241.9)
-
Step 900
900 (this color)
#1D4663
oklch(37.9% 0.068 242.3)
-
Step 950
950
#12293A
oklch(27.1% 0.043 242.6)
#1D4663 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) | #394664 | 0.033 |
| Deuteranopia (no green cones) | #2F4062 | 0.025 |
| Tritanopia (no blue cones) | #004D50 | 0.049 |
| Achromatopsia (no color) | #434343 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4663
#1D4663
oklch(37.9% 0.068 242.3)
- #5B3918
#5B3918
oklch(37.8% 0.067 62.3)
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 #1D4663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.017
- Charcoal #264653 ΔE 0.029
- Twilight Blue #0A437A ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.046
- Dark Teal #014D4E ΔE 0.052
- Midnight Green #073B4C ΔE 0.054
- Marine Blue #01386A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.055
Use #1D4663 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.