#23498B
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.118 260.6), rgb(35, 73, 139).
Aa
White text reads best on this color (8.75:1).
About this color
#23498B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.118 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.009 away. White text reads best on it, at 8.75:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #23498B |
| RGB | rgb(35, 73, 139) |
| HSL | hsl(218, 60%, 34%) |
| OKLCH | oklch(41.5% 0.118 260.6) |
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 #23498B | 8.75:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #23498B | 2.39:1 | Fails | Lc 14.3 | Not readable |
| #23498B text on white | 8.75:1 | AAA | Lc 89.7 | Fine for body text |
| #23498B text on black | 2.39:1 | Fails | Lc -12.6 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A7C2EE
oklch(80.9% 0.069 260.1)
-
Step 400
400
#78A1E5
oklch(70.7% 0.11 260.2)
-
Step 500
500
#5688DE
oklch(63.2% 0.141 260.6)
-
Step 600
600
#3B70CC
oklch(55.7% 0.154 260.6)
-
Step 700
700
#2D5DB0
oklch(49.1% 0.142 260.5)
-
Step 800
800 (this color)
#23498B
oklch(41.5% 0.118 260.6)
-
Step 900
900
#234072
oklch(37.6% 0.093 260.6)
-
Step 950
950
#152643
oklch(27% 0.059 260.5)
#23498B 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) | #26508D | 0.021 |
| Deuteranopia (no green cones) | #0F468A | 0.018 |
| Tritanopia (no blue cones) | #005963 | 0.094 |
| Achromatopsia (no color) | #4B4B4B | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23498B
#23498B
oklch(41.5% 0.118 260.6)
- #644600
#644600
oklch(41.6% 0.086 80.6)
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 #23498B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.009
- Light Navy #155084 ΔE 0.026
- Dusk Blue #26538D ΔE 0.030
- Twilight Blue #0A437A ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.040
- Blueberry #464196 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.054
Use #23498B 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.