#153F72
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.099 255.4), rgb(21, 63, 114).
Aa
White text reads best on this color (10.57:1).
About this color
#153F72 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.099 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.017 away. White text reads best on it, at 10.57:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.98:1 |
| White text | 10.57:1 |
Values
| HEX | #153F72 |
| RGB | rgb(21, 63, 114) |
| HSL | hsl(213, 69%, 26%) |
| OKLCH | oklch(36.8% 0.099 255.4) |
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 #153F72 | 10.57:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #153F72 | 1.98:1 | Fails | Lc 9.7 | Not readable |
| #153F72 text on white | 10.57:1 | AAA | Lc 94.2 | Preferred for body text |
| #153F72 text on black | 1.98:1 | Fails | Lc -8.4 | 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 900.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A1C3F1
oklch(80.8% 0.075 256.1)
-
Step 400
400
#6DA3EA
oklch(70.7% 0.119 255.7)
-
Step 500
500
#438AE3
oklch(63.1% 0.152 255.4)
-
Step 600
600
#2072D1
oklch(55.6% 0.165 255.4)
-
Step 700
700
#115FB5
oklch(49.1% 0.154 255.4)
-
Step 800
800
#134E92
oklch(42.7% 0.126 255.3)
-
Step 900
900 (this color)
#153F72
oklch(36.8% 0.099 255.4)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#153F72 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) | #264374 | 0.022 |
| Deuteranopia (no green cones) | #143B71 | 0.012 |
| Tritanopia (no blue cones) | #004B53 | 0.075 |
| Achromatopsia (no color) | #3F3F3F | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #153F72
#153F72
oklch(36.8% 0.099 255.4)
- #573800
#573800
oklch(36.8% 0.078 74.5)
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 #153F72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.017
- Marine Blue #01386A ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.054
- Cobalt #1E488F ΔE 0.055
- Light Navy #155084 ΔE 0.056
- Marine #042E60 ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.063
Use #153F72 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.