#1D5891
Closest named color: Dusk Blue (#26538D). oklch(45.3% 0.111 251.1), rgb(29, 88, 145).
Aa
White text reads best on this color (7.35:1).
About this color
#1D5891 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.111 and its hue 251°. 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 7.35:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.85:1 |
| White text | 7.35:1 |
Values
| HEX | #1D5891 |
| RGB | rgb(29, 88, 145) |
| HSL | hsl(209, 67%, 34%) |
| OKLCH | oklch(45.3% 0.111 251.1) |
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 #1D5891 | 7.35:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #1D5891 | 2.85:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #1D5891 text on white | 7.35:1 | AAA | Lc 85.2 | Fine for body text |
| #1D5891 text on black | 2.85:1 | Fails | Lc -16.8 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6EA5DF
oklch(70.7% 0.103 250.7)
-
Step 500
500
#458DD6
oklch(63.1% 0.132 251)
-
Step 600
600
#2276C4
oklch(55.7% 0.144 251)
-
Step 700
700
#1262A9
oklch(49% 0.134 251.2)
-
Step 800
800 (this color)
#1D5891
oklch(45.3% 0.111 251.1)
-
Step 900
900
#19436E
oklch(37.7% 0.087 251.7)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#1D5891 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) | #3D5C93 | 0.034 |
| Deuteranopia (no green cones) | #2B5190 | 0.021 |
| Tritanopia (no blue cones) | #00666D | 0.084 |
| Achromatopsia (no color) | #565656 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D5891
#1D5891
oklch(45.3% 0.111 251.1)
- #774B00
#774B00
oklch(45.2% 0.097 71.2)
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 #1D5891, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.022
- Denim Blue #3B5B92 ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy #155084 ΔE 0.031
- Peacock Blue #016795 ΔE 0.043
- Cobalt #1E488F ΔE 0.046
- Denim #3B638C ΔE 0.047
Use #1D5891 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.