#1D3656
Closest named color: Prussian Blue (#1D3557). oklch(33% 0.065 255.3), rgb(29, 54, 86).
Aa
White text reads best on this color (12.24:1).
About this color
#1D3656 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.065 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.004 away. White text reads best on it, at 12.24:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #1D3656 |
| RGB | rgb(29, 54, 86) |
| HSL | hsl(214, 50%, 23%) |
| OKLCH | oklch(33% 0.065 255.3) |
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 #1D3656 | 12.24:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #1D3656 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #1D3656 text on white | 12.24:1 | AAA | Lc 97.8 | Preferred for body text |
| #1D3656 text on black | 1.71:1 | Fails | Lc 0.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3E0
oklch(80.9% 0.048 254.3)
-
Step 400
400
#80A3D1
oklch(70.7% 0.078 255.5)
-
Step 500
500
#5F8CC5
oklch(63.2% 0.1 254.9)
-
Step 600
600
#4575B2
oklch(55.7% 0.109 255.2)
-
Step 700
700
#376299
oklch(49.2% 0.101 255.4)
-
Step 800
800
#2E507C
oklch(42.7% 0.084 255.5)
-
Step 900
900 (this color)
#1D3656
oklch(33% 0.065 255.3)
-
Step 950
950
#18273A
oklch(26.9% 0.041 254.8)
#1D3656 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) | #283857 | 0.016 |
| Deuteranopia (no green cones) | #213355 | 0.010 |
| Tritanopia (no blue cones) | #003D42 | 0.053 |
| Achromatopsia (no color) | #353535 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D3656
#1D3656
oklch(33% 0.065 255.3)
- #483005
#483005
oklch(33% 0.065 76.4)
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 #1D3656, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.004
- Dark Blue Grey #1F3B4D ΔE 0.026
- Midnight Green #073B4C ΔE 0.032
- Marine Blue #01386A ΔE 0.038
- Gunmetal #293241 ΔE 0.038
- Marine #042E60 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.042
- Onyx #343A40 ΔE 0.054
Use #1D3656 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.