#123987
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.138 262.1), rgb(18, 57, 135).
Aa
White text reads best on this color (10.70:1).
About this color
#123987 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.138 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 10.70:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.70:1 |
Values
| HEX | #123987 |
| RGB | rgb(18, 57, 135) |
| HSL | hsl(220, 76%, 30%) |
| OKLCH | oklch(37% 0.138 262.1) |
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 #123987 | 10.70:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #123987 | 1.96:1 | Fails | Lc 9.7 | Not readable |
| #123987 text on white | 10.70:1 | AAA | Lc 94.2 | Preferred for body text |
| #123987 text on black | 1.96:1 | Fails | Lc -8.3 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500
#4282FF
oklch(63.2% 0.198 262)
-
Step 600
600
#1B64F7
oklch(55.6% 0.231 262.2)
-
Step 700
700
#0D52D7
oklch(49.2% 0.214 262.1)
-
Step 800
800
#0F44AE
oklch(42.7% 0.178 262.2)
-
Step 900
900 (this color)
#123987
oklch(37% 0.138 262.1)
-
Step 950
950
#0D2350
oklch(26.9% 0.087 262.5)
#123987 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) | #00438A | 0.027 |
| Deuteranopia (no green cones) | #003985 | 0.010 |
| Tritanopia (no blue cones) | #004D5A | 0.107 |
| Achromatopsia (no color) | #3E3E3E | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #123987
#123987
oklch(37% 0.138 262.1)
- #543B00
#543B00
oklch(37.1% 0.076 81.7)
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 #123987, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Cobalt #1E488F ΔE 0.046
- Marine Blue #01386A ΔE 0.052
- Sapphire #2138AB ΔE 0.061
- Light Navy #155084 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.071
- Royal #0C1793 ΔE 0.073
- Blueberry #464196 ΔE 0.075
Use #123987 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.