#1D4B60
Closest named color: Dark Grey Blue (#29465B). oklch(39.1% 0.061 231), rgb(29, 75, 96).
Aa
White text reads best on this color (9.42:1).
About this color
#1D4B60 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.061 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.018 away. White text reads best on it, at 9.42:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #1D4B60 |
| RGB | rgb(29, 75, 96) |
| HSL | hsl(199, 54%, 25%) |
| OKLCH | oklch(39.1% 0.061 231) |
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 #1D4B60 | 9.42:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #1D4B60 | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #1D4B60 text on white | 9.42:1 | AAA | Lc 91.6 | Preferred for body text |
| #1D4B60 text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C7D9
oklch(81% 0.045 230.4)
-
Step 400
400
#70A9C6
oklch(70.6% 0.073 231.3)
-
Step 500
500
#4694B8
oklch(63.2% 0.094 230.7)
-
Step 600
600
#207DA4
oklch(55.5% 0.102 231.4)
-
Step 700
700
#0F6A8C
oklch(49.2% 0.094 230.3)
-
Step 800
800
#125672
oklch(42.7% 0.079 231.2)
-
Step 900
900 (this color)
#1D4B60
oklch(39.1% 0.061 231)
-
Step 950
950
#102A36
oklch(27.1% 0.039 230.5)
#1D4B60 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) | #404A61 | 0.041 |
| Deuteranopia (no green cones) | #374360 | 0.036 |
| Tritanopia (no blue cones) | #005152 | 0.039 |
| Achromatopsia (no color) | #464646 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4B60
#1D4B60
oklch(39.1% 0.061 231)
- #5F3B26
#5F3B26
oklch(39% 0.061 50.5)
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 #1D4B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.018
- Charcoal #264653 ΔE 0.024
- Deep Teal #00555A ΔE 0.039
- Dark Teal #014D4E ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Blue Green #005249 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.057
Use #1D4B60 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.