#1D5478
Closest named color: Deep Sea Blue (#015482). oklch(42.8% 0.082 241.4), rgb(29, 84, 120).
Aa
White text reads best on this color (8.10:1).
About this color
#1D5478 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.082 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.020 away. White text reads best on it, at 8.10:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #1D5478 |
| RGB | rgb(29, 84, 120) |
| HSL | hsl(204, 61%, 29%) |
| OKLCH | oklch(42.8% 0.082 241.4) |
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 #1D5478 | 8.10:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #1D5478 | 2.59:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #1D5478 text on white | 8.10:1 | AAA | Lc 87.8 | Fine for body text |
| #1D5478 text on black | 2.59:1 | Fails | Lc -14.4 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A6C5DD
oklch(80.9% 0.048 241.5)
-
Step 400
400
#75A7CD
oklch(70.7% 0.077 241.9)
-
Step 500
500
#4E91C0
oklch(63.2% 0.099 241.3)
-
Step 600
600
#2E7AAC
oklch(55.6% 0.107 241.5)
-
Step 700
700
#1F6794
oklch(49.2% 0.1 241.1)
-
Step 800
800 (this color)
#1D5478
oklch(42.8% 0.082 241.4)
-
Step 900
900
#1E4561
oklch(37.6% 0.065 242.5)
-
Step 950
950
#132939
oklch(27.1% 0.041 242)
#1D5478 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) | #43557A | 0.041 |
| Deuteranopia (no green cones) | #374C77 | 0.032 |
| Tritanopia (no blue cones) | #005D61 | 0.056 |
| Achromatopsia (no color) | #505050 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D5478
#1D5478
oklch(42.8% 0.082 241.4)
- #6F4319
#6F4319
oklch(42.7% 0.082 60.8)
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 #1D5478, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.020
- Light Navy #155084 ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.035
- Dusk Blue #26538D ΔE 0.037
- YInMn Blue #415A77 ΔE 0.044
- Petrol #005F6A ΔE 0.048
- Deep Teal #00555A ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.057
Use #1D5478 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.