#1D5585
Closest named color: Deep Sea Blue (#015482). oklch(43.8% 0.098 248.3), rgb(29, 85, 133).
Aa
White text reads best on this color (7.80:1).
About this color
#1D5585 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.098 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.015 away. White text reads best on it, at 7.80:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.69:1 |
| White text | 7.80:1 |
Values
| HEX | #1D5585 |
| RGB | rgb(29, 85, 133) |
| HSL | hsl(208, 64%, 32%) |
| OKLCH | oklch(43.8% 0.098 248.3) |
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 #1D5585 | 7.80:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #1D5585 | 2.69:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #1D5585 text on white | 7.80:1 | AAA | Lc 86.8 | Fine for body text |
| #1D5585 text on black | 2.69:1 | Fails | Lc -15.3 | Dividers and decoration only |
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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A4C5E5
oklch(81% 0.058 247.7)
-
Step 400
400
#72A6D7
oklch(70.8% 0.091 247.8)
-
Step 500
500
#4A8ECD
oklch(63% 0.118 248.6)
-
Step 600
600
#2977BA
oklch(55.5% 0.128 248.6)
-
Step 700
700
#1B64A0
oklch(49.1% 0.118 248.4)
-
Step 800
800 (this color)
#1D5585
oklch(43.8% 0.098 248.3)
-
Step 900
900
#1C4468
oklch(37.7% 0.077 248.4)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#1D5585 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) | #3F5787 | 0.035 |
| Deuteranopia (no green cones) | #304E84 | 0.024 |
| Tritanopia (no blue cones) | #006066 | 0.071 |
| Achromatopsia (no color) | #525252 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D5585
#1D5585
oklch(43.8% 0.098 248.3)
- #744600
#744600
oklch(43.8% 0.096 68)
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 #1D5585, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.015
- Light Navy #155084 ΔE 0.017
- Dusk Blue #26538D ΔE 0.017
- Light Navy Blue #2E5A88 ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.041
- Cobalt #1E488F ΔE 0.044
- YInMn Blue #415A77 ΔE 0.047
- Denim #3B638C ΔE 0.054
Use #1D5585 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.