#023351
Closest named color: Prussian Blue (#1D3557). oklch(30.8% 0.072 242.7), rgb(2, 51, 81).
Aa
White text reads best on this color (13.16:1).
About this color
#023351 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.072 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 13.16:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.59:1 |
| White text | 13.16:1 |
Values
| HEX | #023351 |
| RGB | rgb(2, 51, 81) |
| HSL | hsl(203, 95%, 16%) |
| OKLCH | oklch(30.8% 0.072 242.7) |
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 #023351 | 13.16:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #023351 | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #023351 text on white | 13.16:1 | AAA | Lc 99.1 | Preferred for body text |
| #023351 text on black | 1.59:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECF9
oklch(93.5% 0.025 242.3)
-
Step 200
200
#BFDEF7
oklch(88.6% 0.048 242.5)
-
Step 300
300
#8FC8F4
oklch(81% 0.086 242.3)
-
Step 400
400
#45A9EE
oklch(70.6% 0.137 242.5)
-
Step 500
500
#0091DD
oklch(63.1% 0.152 242.9)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950 (this color)
#023351
oklch(30.8% 0.072 242.7)
#023351 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) | #253452 | 0.033 |
| Deuteranopia (no green cones) | #192D50 | 0.024 |
| Tritanopia (no blue cones) | #003A3E | 0.048 |
| Achromatopsia (no color) | #303030 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #023351
#023351
oklch(30.8% 0.072 242.7)
- #482600
#482600
oklch(30.7% 0.07 62.4)
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 #023351, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Midnight Green #073B4C ΔE 0.031
- Marine #042E60 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.040
- Marine Blue #01386A ΔE 0.045
- Gunmetal #293241 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.053
Use #023351 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.