#1D538F
Closest named color: Dusk Blue (#26538D). oklch(43.9% 0.114 253.8), rgb(29, 83, 143).
Aa
White text reads best on this color (7.81:1).
About this color
#1D538F is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.114 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.007 away. White text reads best on it, at 7.81:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #1D538F |
| RGB | rgb(29, 83, 143) |
| HSL | hsl(212, 66%, 34%) |
| OKLCH | oklch(43.9% 0.114 253.8) |
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 #1D538F | 7.81:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #1D538F | 2.68:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #1D538F text on white | 7.81:1 | AAA | Lc 86.8 | Fine for body text |
| #1D538F text on black | 2.68:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A3C4EB
oklch(81% 0.066 252.8)
-
Step 400
400
#71A4E2
oklch(70.8% 0.106 253.9)
-
Step 500
500
#498CD9
oklch(63.2% 0.135 253.5)
-
Step 600
600
#2974C7
oklch(55.6% 0.148 253.9)
-
Step 700
700
#1A61AC
oklch(49.1% 0.138 253.7)
-
Step 800
800 (this color)
#1D538F
oklch(43.9% 0.114 253.8)
-
Step 900
900
#1B426F
oklch(37.6% 0.089 253.9)
-
Step 950
950
#112741
oklch(26.9% 0.056 253.9)
#1D538F 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) | #365891 | 0.029 |
| Deuteranopia (no green cones) | #224D8E | 0.017 |
| Tritanopia (no blue cones) | #00616A | 0.085 |
| Achromatopsia (no color) | #525252 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D538F
#1D538F
oklch(43.9% 0.114 253.8)
- #714900
#714900
oklch(44% 0.094 73.4)
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 #1D538F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.007
- Light Navy #155084 ΔE 0.021
- Deep Sea Blue #015482 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.031
- Cobalt #1E488F ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.040
- Twilight #4E518B ΔE 0.055
- Peacock Blue #016795 ΔE 0.057
Use #1D538F 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.