#1D4D63
Closest named color: Dark Grey Blue (#29465B). oklch(39.8% 0.063 231.3), rgb(29, 77, 99).
Aa
White text reads best on this color (9.15:1).
About this color
#1D4D63 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.063 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.024 away. White text reads best on it, at 9.15:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #1D4D63 |
| RGB | rgb(29, 77, 99) |
| HSL | hsl(199, 55%, 25%) |
| OKLCH | oklch(39.8% 0.063 231.3) |
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 #1D4D63 | 9.15:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #1D4D63 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #1D4D63 text on white | 9.15:1 | AAA | Lc 90.9 | Preferred for body text |
| #1D4D63 text on black | 2.29:1 | Fails | Lc -11.5 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A2C7DA
oklch(80.9% 0.048 230.4)
-
Step 400
400
#6EAAC8
oklch(70.8% 0.076 231)
-
Step 500
500
#4294BA
oklch(63.2% 0.097 231.2)
-
Step 600
600
#197DA6
oklch(55.5% 0.106 231.9)
-
Step 700
700
#046A8E
oklch(49.2% 0.098 230.9)
-
Step 800
800
#0D5673
oklch(42.6% 0.081 231.3)
-
Step 900
900 (this color)
#1D4D63
oklch(39.8% 0.063 231.3)
-
Step 950
950
#0F2A36
oklch(27% 0.04 229.8)
#1D4D63 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) | #424C64 | 0.043 |
| Deuteranopia (no green cones) | #384563 | 0.036 |
| Tritanopia (no blue cones) | #005354 | 0.040 |
| Achromatopsia (no color) | #484848 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4D63
#1D4D63
oklch(39.8% 0.063 231.3)
- #623D26
#623D26
oklch(39.8% 0.063 51.9)
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 #1D4D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.024
- Charcoal #264653 ΔE 0.030
- Deep Teal #00555A ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.040
- Dark Teal #014D4E ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.052
- Light Navy #155084 ΔE 0.055
- Petrol #005F6A ΔE 0.056
Use #1D4D63 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.