#33457D
Closest named color: Cobalt (#1E488F). oklch(40.5% 0.097 268.4), rgb(51, 69, 125).
Aa
White text reads best on this color (9.17:1).
About this color
#33457D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.097 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.035 away. White text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #33457D |
| RGB | rgb(51, 69, 125) |
| HSL | hsl(225, 42%, 35%) |
| OKLCH | oklch(40.5% 0.097 268.4) |
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 #33457D | 9.17:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #33457D | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #33457D text on white | 9.17:1 | AAA | Lc 91.0 | Preferred for body text |
| #33457D text on black | 2.28:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E6
oklch(80.9% 0.056 268.2)
-
Step 400
400
#899FDA
oklch(70.8% 0.09 268.3)
-
Step 500
500
#6C86D0
oklch(63.2% 0.116 268.3)
-
Step 600
600
#546EBD
oklch(55.6% 0.127 268.4)
-
Step 700
700
#455CA3
oklch(49.2% 0.117 268.4)
-
Step 800
800 (this color)
#33457D
oklch(40.5% 0.097 268.4)
-
Step 900
900
#313F6A
oklch(37.7% 0.076 268.9)
-
Step 950
950
#1D253E
oklch(27% 0.048 269.5)
#33457D 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) | #2C4B7F | 0.018 |
| Deuteranopia (no green cones) | #23457C | 0.019 |
| Tritanopia (no blue cones) | #01515B | 0.086 |
| Achromatopsia (no color) | #484848 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33457D
#33457D
oklch(40.5% 0.097 268.4)
- #5B4600
#5B4600
oklch(40.5% 0.083 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 #33457D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.035
- Light Navy #155084 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.039
- Dusk Blue #26538D ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.050
- Blueberry #464196 ΔE 0.052
- Twilight #4E518B ΔE 0.058
Use #33457D 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.