#1D536D
Closest named color: Deep Sea Blue (#015482). oklch(41.9% 0.071 233), rgb(29, 83, 109).
Aa
White text reads best on this color (8.36:1).
About this color
#1D536D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.071 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.036 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #1D536D |
| RGB | rgb(29, 83, 109) |
| HSL | hsl(200, 58%, 27%) |
| OKLCH | oklch(41.9% 0.071 233) |
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 #1D536D | 8.36:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #1D536D | 2.51:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #1D536D text on white | 8.36:1 | AAA | Lc 88.6 | Fine for body text |
| #1D536D text on black | 2.51:1 | Fails | Lc -13.6 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A7C6D7
oklch(80.9% 0.041 231.9)
-
Step 400
400
#77A8C3
oklch(70.7% 0.065 233)
-
Step 500
500
#5192B4
oklch(63% 0.084 233.1)
-
Step 600
600
#327CA0
oklch(55.6% 0.091 233)
-
Step 700
700
#236889
oklch(49% 0.085 233.4)
-
Step 800
800 (this color)
#1D536D
oklch(41.9% 0.071 233)
-
Step 900
900
#20465A
oklch(37.6% 0.055 233.9)
-
Step 950
950
#142935
oklch(26.9% 0.035 235.2)
#1D536D 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) | #46526E | 0.045 |
| Deuteranopia (no green cones) | #3B4A6D | 0.039 |
| Tritanopia (no blue cones) | #005A5C | 0.044 |
| Achromatopsia (no color) | #4E4E4E | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D536D
#1D536D
oklch(41.9% 0.071 233)
- #6B4126
#6B4126
oklch(41.9% 0.071 52.4)
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 #1D536D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.036
- Deep Teal #00555A ΔE 0.039
- Petrol #005F6A ΔE 0.041
- Light Navy #155084 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.044
- YInMn Blue #415A77 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.051
Use #1D536D 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.