#1D5688
Closest named color: Dusk Blue (#26538D). oklch(44.2% 0.101 248.9), rgb(29, 86, 136).
Aa
White text reads best on this color (7.66:1).
About this color
#1D5688 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.101 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.015 away. White text reads best on it, at 7.66:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.73:1 |
| White text | 7.66:1 |
Values
| HEX | #1D5688 |
| RGB | rgb(29, 86, 136) |
| HSL | hsl(208, 65%, 32%) |
| OKLCH | oklch(44.2% 0.101 248.9) |
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 #1D5688 | 7.66:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #1D5688 | 2.73:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #1D5688 text on white | 7.66:1 | AAA | Lc 86.3 | Fine for body text |
| #1D5688 text on black | 2.73:1 | Fails | Lc -15.8 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#71A5D9
oklch(70.6% 0.095 249.3)
-
Step 500
500
#498ECF
oklch(63.1% 0.121 249.1)
-
Step 600
600
#2777BC
oklch(55.6% 0.131 248.9)
-
Step 700
700
#1864A2
oklch(49.1% 0.122 248.6)
-
Step 800
800 (this color)
#1D5688
oklch(44.2% 0.101 248.9)
-
Step 900
900
#1B4469
oklch(37.7% 0.078 248.6)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#1D5688 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) | #3F598A | 0.036 |
| Deuteranopia (no green cones) | #2F4F87 | 0.023 |
| Tritanopia (no blue cones) | #006268 | 0.075 |
| Achromatopsia (no color) | #535353 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D5688
#1D5688
oklch(44.2% 0.101 248.9)
- #754700
#754700
oklch(44.1% 0.097 68.4)
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 #1D5688, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.015
- Deep Sea Blue #015482 ΔE 0.018
- Light Navy #155084 ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.020
- Denim Blue #3B5B92 ΔE 0.037
- Cobalt #1E488F ΔE 0.044
- YInMn Blue #415A77 ΔE 0.048
- Peacock Blue #016795 ΔE 0.050
Use #1D5688 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.