#33407F
Closest named color: Cobalt (#1E488F). oklch(39.5% 0.107 271.9), rgb(51, 64, 127).
Aa
White text reads best on this color (9.63:1).
About this color
#33407F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.107 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.036 away. White text reads best on it, at 9.63:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.18:1 |
| White text | 9.63:1 |
Values
| HEX | #33407F |
| RGB | rgb(51, 64, 127) |
| HSL | hsl(230, 43%, 35%) |
| OKLCH | oklch(39.5% 0.107 271.9) |
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 #33407F | 9.63:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #33407F | 2.18:1 | Fails | Lc 11.8 | Not readable |
| #33407F text on white | 9.63:1 | AAA | Lc 92.1 | Preferred for body text |
| #33407F text on black | 2.18:1 | Fails | Lc -10.3 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#AEBEF5
oklch(80.9% 0.08 271.9)
-
Step 400
400
#859BF0
oklch(70.8% 0.127 271.8)
-
Step 500
500
#687FEB
oklch(63.1% 0.163 271.9)
-
Step 600
600
#5165DA
oklch(55.5% 0.179 272)
-
Step 700
700
#4253BD
oklch(49% 0.167 271.9)
-
Step 800
800
#364599
oklch(42.7% 0.138 271.7)
-
Step 900
900 (this color)
#33407F
oklch(39.5% 0.107 271.9)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#33407F 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) | #214881 | 0.028 |
| Deuteranopia (no green cones) | #16427E | 0.030 |
| Tritanopia (no blue cones) | #004E59 | 0.095 |
| Achromatopsia (no color) | #454545 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33407F
#33407F
oklch(39.5% 0.107 271.9)
- #564400
#564400
oklch(39.4% 0.081 91.6)
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 #33407F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.036
- Twilight Blue #0A437A ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.039
- Blueberry #464196 ΔE 0.048
- Light Navy #155084 ΔE 0.049
- Dusk Blue #26538D ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.062
- Marine Blue #01386A ΔE 0.066
Use #33407F 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.