#23557D
Closest named color: Deep Sea Blue (#015482). oklch(43.5% 0.085 245.8), rgb(35, 85, 125).
Aa
White text reads best on this color (7.87:1).
About this color
#23557D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.085 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.019 away. White text reads best on it, at 7.87:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #23557D |
| RGB | rgb(35, 85, 125) |
| HSL | hsl(207, 56%, 31%) |
| OKLCH | oklch(43.5% 0.085 245.8) |
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 #23557D | 7.87:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #23557D | 2.66:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #23557D text on white | 7.87:1 | AAA | Lc 87.1 | Fine for body text |
| #23557D text on black | 2.66:1 | Fails | Lc -15.0 | Dividers and decoration only |
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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A7C5DF
oklch(81% 0.049 244.6)
-
Step 400
400
#77A6D0
oklch(70.8% 0.08 246.2)
-
Step 500
500
#518FC3
oklch(63% 0.102 245.7)
-
Step 600
600
#3379B0
oklch(55.7% 0.111 245.5)
-
Step 700
700
#256597
oklch(49.1% 0.103 245.9)
-
Step 800
800 (this color)
#23557D
oklch(43.5% 0.085 245.8)
-
Step 900
900
#204563
oklch(37.8% 0.067 245.4)
-
Step 950
950
#14283A
oklch(26.9% 0.043 247.2)
#23557D 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) | #43567F | 0.036 |
| Deuteranopia (no green cones) | #374E7C | 0.027 |
| Tritanopia (no blue cones) | #005F63 | 0.064 |
| Achromatopsia (no color) | #525252 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23557D
#23557D
oklch(43.5% 0.085 245.8)
- #714615
#714615
oklch(43.5% 0.085 64.9)
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 #23557D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.019
- Light Navy #155084 ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.025
- Dusk Blue #26538D ΔE 0.029
- YInMn Blue #415A77 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.046
- Dusk #4E5481 ΔE 0.051
- Petrol #005F6A ΔE 0.053
Use #23557D 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.