#273A93
Closest named color: Cobalt (#1E488F). oklch(39.1% 0.148 269.2), rgb(39, 58, 147).
Aa
White text reads best on this color (9.93:1).
About this color
#273A93 is a dark, vivid blue. In OKLCH its lightness is 39%, its chroma 0.148 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.038 away. White text reads best on it, at 9.93:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #273A93 |
| RGB | rgb(39, 58, 147) |
| HSL | hsl(229, 58%, 36%) |
| OKLCH | oklch(39.1% 0.148 269.2) |
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 #273A93 | 9.93:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #273A93 | 2.11:1 | Fails | Lc 11.4 | Not readable |
| #273A93 text on white | 9.93:1 | AAA | Lc 92.6 | Preferred for body text |
| #273A93 text on black | 2.11:1 | Fails | Lc -9.9 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600
#3F5AFF
oklch(55.6% 0.244 269.2)
-
Step 700
700
#3247E0
oklch(49.1% 0.23 269.2)
-
Step 800
800
#293CB4
oklch(42.6% 0.189 269.2)
-
Step 900
900 (this color)
#273A93
oklch(39.1% 0.148 269.2)
-
Step 950
950
#152153
oklch(27.1% 0.092 269.2)
#273A93 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) | #004896 | 0.039 |
| Deuteranopia (no green cones) | #003E91 | 0.027 |
| Tritanopia (no blue cones) | #005060 | 0.118 |
| Achromatopsia (no color) | #434343 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #273A93
#273A93
oklch(39.1% 0.148 269.2)
- #564200
#564200
oklch(39% 0.08 89.1)
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 #273A93, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.038
- Sapphire #2138AB ΔE 0.040
- Blueberry #464196 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.052
- Twilight Blue #0A437A ΔE 0.054
- Light Navy #155084 ΔE 0.068
- Dusk Blue #26538D ΔE 0.070
- Indigo Blue #3A18B1 ΔE 0.074
Use #273A93 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.